Run integration tests in Ubuntu 14.04 (#370)

The tests were disabled because we used to build the Cloud
Bigtable Emulator from source, and Ubuntu 14.04 native golang
tools could not do it.  Now that we install the emulator via the
Cloud SDK, this is no longer an issue.  This fixes #361.

Ignore testing components in code coverage reports.

Author: coryan

.codecov.yml

@@ -14,3 +14,14 @@ ignore:
   - "*.pb.h"
   # Ignore third party code and dependencies too.
   - "/third_party/**"
+  # Ignore the bigtable/client/testing directory, because these are components
+  # to drive testing, their coverage is not interesting.
+  - "/bigtable/client/testing/**"
+  # Ignore the bigtable/tests/ directory, because these are integration tests,
+  # also used to drive testing and therefore their coverage is not interesting.
+  - "/bigtable/tests/**"
+  # Ignore the benchmarks, they are not important for the experience for our
+  # users.
+  - "/bigtable/benchmarks/**"
+  # Also ignore the unit tests.
+  - "**/*_test.cc$"

ci/build-docker.sh

@@ -74,12 +74,8 @@ echo "${COLOR_YELLOW}Finished build at: $(date)${COLOR_RESET}"
 # Run the tests and output any failures.
 CTEST_OUTPUT_ON_FAILURE=1 make -j ${NCPU} test
 
-# If possible, run the integration tests.
-if [ -r /etc/lsb-release ] && grep -q 14.04 /etc/lsb-release; then
-  echo "Skipping integration tests, Go version too old in Ubuntu 14.04."
-else
-  (cd bigtable/tests && /v/bigtable/tests/run_integration_tests_emulator.sh)
-fi
+# Run the integration tests.
+(cd bigtable/tests && /v/bigtable/tests/run_integration_tests_emulator.sh)
 
 # Some of the sanitizers only emit errors and do not change the error code
 # of the tests, find any such errors and report them as a build failure.