GitLab

- MariaDB connector now compiles correctly on MacOS
- Perfevent DCDBPusher plugin re-added to targets

- "Fixed" segmentation fault occurring after the return of dcdbpusher's
main by not unloading dynamic libraries in PluginManager's destructor
- Error log messages in Aggregator plugin changed to Debug level
- Added Wno-unused-variable and Wno-unused-function compile flags
- Tweaked the stop method of TesterSensorGroup
- Re-worked the destructor of SARParser in ProcFS plugin

Move CXXFLAGS definitions to config.mk and thus streamline compiler flags for all Makefiles in subdirectories