changes to support the DB connection changes between Tomcat 7 and Tomcat 8.

Tomcat 7 defaulted DB connections to 2 (which was fine with Cloud Foundry's free DB service).
Tomcat 8 increaded DB connections to 10 (which blew up the initial connection pool).
modified ds.xml to explictly state the size of the DB Connection Pool.
Updated ds.xml for Tomcat changes.

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