Fixed bug in lucene autocompleter where for search terms containing special chars

(cherry picked from commit 77376cd79ea143eaded1b414c9cee1038d4cb1f8)

Conflicts:
	contentconnector-lucene-autocomplete/src/main/java/com/gentics/cr/lucene/autocomplete/Autocompleter.java
Merge pull request #39 from sebastianvogel/hotfix-1.16-RT58553

Fixed bug in lucene autocompleter where for search terms containing spec...