added processor key and datasource key to request entity
added clearing of datasourcerequests
Merge branch 'releases/1.3.4' of https://github.com/IstiN/android_xcore into xcore_2.0

Conflicts:
	xcore-library/xcore/src/main/java/by/istin/android/xcore/service/DataSourceService.java
Merge branch 'releases/1.3.4' of https://github.com/IstiN/android_xcore into xcore_2.0

Conflicts:
	xcore-library/xcore/src/main/java/by/istin/android/xcore/service/DataSourceService.java