message: Remove WARNING_AS_ERRORS option from gcc5 build.
diff: @@ -18,7 +18,7 @@ FROM axom/compilers:gcc-5 AS gcc5-debug
  ENV GTEST_COLOR=1
  COPY --chown=axom:axom . /home/axom/workspace
  WORKDIR /home/axom/workspace
  -RUN mkdir build && cd build && cmake -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Debug -DENABLE_WARNINGS=On -DENABLE_WARNINGS_AS_ERRORS=On -DENABLE_COVERAGE=On -DENABLE_TBB=On ..
  +RUN mkdir build && cd build && cmake -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Debug -DENABLE_WARNINGS=On -DENABLE_COVERAGE=On -DENABLE_TBB=On ..
  RUN cd build && make -j 16
  RUN cd build && ctest -T test --output-on-failure
  