Fixing IMap::clear call on standalone nodes (backport)
Fixed index removal
Moved fis.close and added comment to the FilteringClassLoader
Added try / finally to reset tccl after test
Added try / finally to reset tccl after test
Switched unittest to serial mode to prevent thread switches
Exchanged file loading with stream loading in FilteringClassLoader
Merge pull request #2298 from noctarius/fix-map-clear-standalone

Fixing IMap::clear call on standalone nodes (backport)