Error fix for Docker builds on master branch. Duplicate Job not ignored (#650)

Author: Jonathan DEKHTIAR

.circleci/config.yml

@@ -441,31 +441,27 @@ workflows:
               ignore: /.*/
             branches:
               ignore: master
-              only: /.*/
 
       - test_sources_py2_gpu:
           filters:
             tags:
               ignore: /.*/
             branches:
               ignore: master
-              only: /.*/
 
       - test_sources_py3_cpu:
           filters:
             tags:
               ignore: /.*/
             branches:
               ignore: master
-              only: /.*/
 
       - test_sources_py3_gpu:
           filters:
             tags:
               ignore: /.*/
             branches:
               ignore: master
-              only: /.*/
 
       ###################################################################################
       #           MASTER BRANCH BUILDS with TensorLayer installed from Source           #
@@ -545,4 +541,4 @@ workflows:
             tags:
               only: /.*/
             branches:
-              ignore: /.*/
+              ignore: /.*/