Avoid VLOG calls throwing when running vault tests.
Fixed test_common for MSVC.
Merge pull request #33 from Fraser999/MAID-199_fix_test_common

MAID-199 Fixed test_common for MSVC.
Merge pull request #32 from Fraser999/vlog_gtest_fix

MAID-196: Avoid VLOG calls throwing when running vault tests.