[HOT FIX ] Logstash Pipeline

[HOT FIX] v0.1.7-alpha02262019 - Logstash Pipeline

helk-logstash
+ Added offline plugins file
+ Updated win security conversion
+ cleaned process-name filter & process-name-split configs
+ cleaned process-id filter & proces-id conversion configs
+ set kafka max poll records to 500
+ updated SOURCE_ & TARGET_ field names from process entity to be renamed process_source_ and process_target. Following the basic `entity_context_property` from OSSEM CIM