Summary:
Rework test running script.
New options SuiteRun - runs specified executables as google suite
test cases in parallel.
Run - this option now runs executables in parallel the same as 'tests'
RunAll - scans for test executables and attempts to run them all
as suites except those mentiones in RunOnly (hardcoded in the script)
or specified either in $ExcludeTestCases $ExcludeTestExe
Closes https://github.com/facebook/rocksdb/pull/2089
Differential Revision: D4832212
Pulled By: yiwu-arbug
fbshipit-source-id: 954990c
e5a1372b24