Remove mysql-connector-java-5.1.15.jar from smoke test sources

There is a mysql-connector-java binary jar file in WildFly source code at:

testsuite/integration/smoke/src/test/resources/mysql-connector-java-5.1.15.jar

which is used by AddMySqlDataSourceOperationsUnitTestCase to test defining a data-source with a deployed jdbc jar instead of JBoss module definition.

Having a binary jar file in the source code is bad, it would be better to remove it.

It does not need to be mysql specific from what I learned in this test case, generate a faked jdbc driver jar on the fly should be enough for the test.