Adds missing method introduced in Java 7 to DataSource. Builds on Java 6
and 7 successfully again.
Merge pull request #122 from dschlenk/1.12-java7-fix

Makes sense to me.
Add a second escaped backslash to the last line of the hard coded rrd
graph command template in the MIB compiler so that NRTG works for graphs
generated by the MIB compiler.
Fixes unit test to agree with the new file size
Merge remote-tracking branch 'origin/1.12' into rc/stable/1.14.0

Conflicts:
	opennms-services/src/main/java/org/opennms/netmgt/poller/MonitorTester.java