* [AIBT-446] Run nGraph-ONNX tests on nGraph PRs

* Cloning nGraph from NervanaSystems

* Updated CI path to "ngraph/.ci/onnx/jenkins"

* Updated permissions

* Fixed path in find command

* Changes to notification message

* Editing CMakeCache.txt instead of removing

* Removing old ngraph wheels; cloning pybind11 if necessary

* Fixed path in removing ngraph wheel

* Add Travis testing on CentOS
* Disable building CPU Backend
* Remove Python dependencies from CentOS for now

* onnx: pull Protobuf 3.5.x from GitHub
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix Travis build configuration issue
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: additional fixes for Travis
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: update documentation - build requirements for MacOS
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: update documentation - build requirements for Ubuntu
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* Initial stab at a trigger script for Jenkins mult-branch pipeline

* CHANGE_URL is not working, so disable for now

* CHANGE_AUTHOR not found either, disabling

* Disable some prints of vars that do not appear to be available

* Add in node block

* Correct the node-label expression

* Put Jenkins repo in a subdirectory and use the requested branch

* Fix groovy syntax error

* Call ngraph-unittest.groovy

* Corrected the branch name for cje-algo

* Now that the GitHub plugin is working, try restoring CHANGE_URL and CHANGE_AUTHOR

* Set an environment variable MB_PIPELINE_CHECKOUT, to trigger proper checkout command in runNgraphBuild()

* Try alternate load mechanism

* I've settled on using "load()" to directly run the code in ngraph-unittest.groovy, so remove vestigal loading of an ngraphUnitTest() function

* Change parameter assignments to be of the form params.var = 'new value'

* Try alternate method of setting parameter values for ngraph-unittest.groovy

* Try parameters-setting syntax from https://qa.nuxeo.org/jenkins/pipeline-syntax/globals#params

* Correct typo

* Try to work around parameter expansion issue

* Modify strategy for passing parameters and using MB Pipeline style checkouts, as per discussions with Nick

* Fixed calling syntax

* Simply call

* Make job parameters as local variables and passed as parameters to ngraphCIPremerge() function, as many of these are used in the closure for parallel tasks, and the lexically scoped global vaiariables was causing function signature mismatches on runNgraphBuild() calls.

* Remove prints

* Move CI to working from Jenkins cje-algo master branch

* Add standard header copyright message

* Changes from suggestions in PR review

* Revert env.WORKSPACE (requested in a review) because it wasn't working -- a "null" ending up in the load path, for unknown reasons

* Update Dockerfile

reverted the INTERPRETER CHANGES

* Added a conditional for a prebuilt argument based on task type

* Added default arg and also conditional cmake argument

* Update .travis.yml

* Update Dockerfile

* remove test that relies on CPU if CPU is not built

* fix docker build

* change onnx to use INTERPRETER

* run unit-test-check

* onnx: add 'constant' operator
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: getting attribute value by name
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix code style
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix clang compilation warnings
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: exception
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: add 'split' operator
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: add public interface
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: add initial unit test for importer
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: initial implementetion of operator' set
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* [WIP] Unit test for split operation.

* Fix Split Op bounds calculation + UT

* clang format

* Split Op with variable parts unit test.

* Remove unused headers

* Add missing ngraph install prefix for cmake in travis Dockerfile.

* Remove -Wno-zero-as-null-pointer-constant

* Code review

* Apply clang-format-3.9

* Add missing onnx_import interface files to CMakeList

* Copyright notice format

* Update Dockerfile

Added -j 4 to speed up build times

* Update Dockerfile

j -4 comes across the same error as j -8 so moving this to j -2

* Update Dockerfile

* Update Dockerfile

* experimenting with less number of tasks

* Update Dockerfile

* Added cmake changes to use the INTERPRETER instead of cpu.

* Update .travis.yml

* Update Dockerfile

took out make -j 8 as we are running out of virtual memory.
added df -k for getting the disk space info in logs.

* Update .travis.yml

As we bring up 3 containers here i am reducing to 2 and trying to see if this is deployed on different  machines then should not matter.

* Update .travis.yml

3 in parallel should pass also 2 of then are passing so trying this out

This reverts commit 549a4fd1.

* remove custom install path

* fix travis build

* Add NGRAPH_INSTALL_PREFIX as an alias for CMAKE_INSTALL_PREFIX to make our unit tests pass.

* change install path setting

Force test to fail if any env fails.

* Remove the no longer supported alternative installation method for
python binding.

* Put back CMakeLists.txt as it is used by travis ci dockerfile.

* Remove python/CMakeLists.txt and update Travis CI

* Enable Travis CI

* Enable Travis CI - update README

* Travis CI - Parallel testing