XD-1751 Connection Pool settings for jdbc modules

* Includes common pool settings as well as tomcat enhanced attributes
* Initial size is set to zero vs. the default of 10.
* Jdbc Unit has a test for testOnBorrow setting.
* hdfsjdbc, jdbchdfs & filejdbc testing will be covered by acceptance tests
* Code Polishing
The year needs to be changes :-) Same change is required in JdbcConnectionPoolMixin as well.