remove the limit in the query of patch sets by revision.

Currently there a limit of two for the results of query
based on revision. The reason to put this limit when the
query was written is unknown.
Since, there can be many changes that correspond to a
commit and all the changes should be provided to user,
this commit removes that limit.

Change-Id: I49401e37b70caa448176d6394bc0f9159ebe2fed
1 file changed