Fix failing test in TestRS.java

[kevinphippsstfc]

Currently the integration tests fail because the wrong number of results are returned from a search.

There is already a comment on line 690 pointing this out but the code has not been corrected yet:

https://github.com/icatproject/icat.server/blob/master/src/test/java/org/icatproject/integration/TestRS.java#L690

so this should be done.