Fix of the CI reproduction script (#3058)

* Correct the dockerfile name and the way to pass multiple env vars to a container

* Docs fix

* Typo fix

.ci/onnx/jenkins/README.md

@@ -2,7 +2,7 @@
 From directory containing CI scripts execute runCI.sh bash script:
 
 ```
-cd <path-to-repo>/.ci/jenkins/
+cd <path-to-repo>/.ci/onnx/jenkins/
 ./runCI.sh
 ```
 

.ci/onnx/jenkins/runCI.sh

@@ -28,7 +28,7 @@ function run() {
     set -e
 
     cd ./dockerfiles
-    docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -f=./ubuntu-16_04.dockerfile -t ngraph-onnx:ubuntu-16_04 .
+    docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -f=./ubuntu_16_04.dockerfile -t ngraph-onnx:ubuntu-16_04 .
 
     cd "${CI_PATH}"
     if [[ -z $(docker ps -a | grep -i "${DOCKER_CONTAINER}") ]];
@@ -65,8 +65,8 @@ function run() {
         fi'
     docker exec "${DOCKER_CONTAINER}" bash -c "${CLONE_CMD}"
     NGRAPH_WHL=$(docker exec ${DOCKER_CONTAINER} find /root/python/dist/ -name "ngraph*.whl")
-    docker exec -e TOX_INSTALL_NGRAPH_FROM="${NGRAPH_WHL}" NGRAPH_BACKEND=CPU "${DOCKER_CONTAINER}" tox -c /root/ngraph-onnx/
-    docker exec -e TOX_INSTALL_NGRAPH_FROM="${NGRAPH_WHL}" NGRAPH_BACKEND=INTEPRETER "${DOCKER_CONTAINER}" tox -c /root/ngraph-onnx/
+    docker exec -e TOX_INSTALL_NGRAPH_FROM="${NGRAPH_WHL}" -e NGRAPH_BACKEND=CPU "${DOCKER_CONTAINER}" tox -c /root/ngraph-onnx/
+    docker exec -e TOX_INSTALL_NGRAPH_FROM="${NGRAPH_WHL}" -e NGRAPH_BACKEND=INTEPRETER "${DOCKER_CONTAINER}" tox -c /root/ngraph-onnx/
 }
 
 # Function cleanup() removes items related to nGraph, created during script execution