Fixed some "rawtype" warnings

Change-Id: I7fe5cf2212b36962919fd509ce8bbe02df9bd365
Signed-off-by: Michael Ochmann <michael.ochmann@sap.com>
Remove obsolete variable "eventService" from LuceneSearchComponent

Change-Id: I08195a7eb3807531b6b20ff3f37d29f21e1c4341
Signed-off-by: Michael Ochmann <michael.ochmann@sap.com>
Fixed some deprecation warnings in LuceneIndex

Some IndexReader/IndexWriter constructors we were using are no
longer supported and have been replaced with equivalent constructs.

Change-Id: Ia63b9eeb27d3221957b5f0d097300f86a06716a2
Signed-off-by: Michael Ochmann <michael.ochmann@sap.com>
Introduced constant LUCENE_VERSION in LuceneIndex

Change-Id: Ie02d4589699283301ced70d3fbd9e202580e8632
Signed-off-by: Michael Ochmann <michael.ochmann@sap.com>