Allow Zanata to start even if Lucene lock files are found

As of 4.4, Hibernate Search's NativeFSLockFactory should be able to
   deal with dead lock files.
Output a warning if indexes are stored in NFS.
Fix the bad user management data scroller

Fix the ridiculous width of the scroller,
the current page always being '1',
the synchronisation between the header and footer scrollers.
Fix some broken tests for Wildfly

Also simplify some of the error stuff, as it was causing problems
Merge pull request #609 from zanata/fix-bad-datascroller

Fix the bad user management data scroller
Merge pull request #562 from zanata/skipLockCheckUnlessNFS

Allow Zanata to start even if Lucene lock files are found
Merge pull request #605 from zanata/fix-the-wildfly-tests-again

Fix some broken tests for Wildfly
Fix editor toggle issue: https://bugzilla.redhat.com/show_bug.cgi?id=1154451
rhbz1154555 - Fix process manager screen issue.

The problem arises when there is a process running and the process manager screen is loaded. With the old async task implementation, the process manager expected a task name. This field is no longer present in the async task handles. For the time being, the process will present a string representation of the task handle. This should be changed in future revisions.