fix stop filter
Remove cast
one more nocommit
Removed the work around to prevent p/c error when invoking #iterator() twice, because the custom query filter wrapper now doesn't transform the result to a cache doc id set any more.

I think the transforming to a cachable doc id set in CustomQueryWrappingFilter isn't needed at all, because we use the DocIdSet only once and because of that is just slowed things down.
Remove redundant null check
remove nocommit - this is not an issue
add tests for these analyzers
fix CompletionPostingsFormatTest