fixup on master to be consistent with 5.5.0

[ehennum]

A few signatures in this interface and implementation are out of synch between In the master branch and the 5.5.0 branch:

 marklogic-client-api/src/main/java/com/marklogic/client/expression/CtsExpr.java
 marklogic-client-api/src/main/java/com/marklogic/client/impl/CtsExprImpl.java

Possibly the merge of develop to master rebased the master version of these files on top of the develop version.

We had to make a hotfix to the same files under issue #1263 for release 5.3.1; maybe that was the cause.

We'll need to watch to make sure that this commit doesn't cause a similar reversion in a future release.

[ehennum]

Master should compile now. Copying @llinggit for awareness.

[georgeajit]

Issues is fixed. Tested on the master branch with IDE.