Wildcards in fulltext query against H2

Currently we cannot use leading wildcards in queries against H2. Lucene allows to do it by setting `setAllowLeadingWildcard` to the `QueryParser`.
This is an important feature to have for development.

Example:

SELECT * FROM Document WHERE ecm:fulltext = '*text'

Since, the flag for the Lucene parser wasn't set such query agains H2 causes an exception.