GitLab

Makes the Python tests more stable (by Vlad Losev); fixes a memory leak in GetThreadCount() on Mac (by Vlad Losev); improves fuse_gtest_files.py to support fusing Google Mock files (by Zhanyong Wan).

Cleans up death test implementation (by Vlad Losev); changes the XML format to be closer to junitreport (by Zhanyong Wan).

* changes the XML report format to match JUnit/Ant's.
* improves file path handling.
* allows the user to disable RTTI using the GTEST_HAS_RTTI macro.
* makes the code compile with -Wswitch-enum.