Rename all "timestamp" columns.  Timestamp is a reserved word in Oracle.

This is Part 2 of commits to add support for Oracle to the Cloud Controller.

In this PR I am amending the Cloud Controller to not use columns named "timestamp" since timestamp is a reserved word in Oracle.

To accomplish this I:
* renamed the columns and added tests to ensure no columns named "timestamp" are added in the future.
* created Sequel aliases for those columns to maintain API compatibility.
* Added support for aliases to the query_parameters portion of the CC API query framework with appropriate tests.

Lets see if you can merge this one as quick as the last one. :)