Toolkit method update for REST API DatasourceResources controller

[zack-rma]

Problem Description

Only distinction between a not found error and other DatabaseExceptions was the error message String.

Solution

Adds a ValueNotFoundException throwable to the DatabaseException thrown when a requested item is not found.

how you tested the change

Tested in REST API against OpenTSDB instance.

Where the following done:

• Tests. Check all that apply:
  • Unit tests created or modified that run during ant test.
  • Integration tests created or modified that run during integration testing
    (Formerly called regression tests.)
  • Test procedure descriptions for manual testing
• Was relevant documentation updated?
• Were relevant config element (e.g. XML data) updated as appropriate

If you aren't sure leave unchecked and we will help guide you to want needs changing where.