NMS-6660: Document JdbcStoredProcedureMonitor

- Migrate pull request to OpenNMS devel instead development/docs
Update JDBCStoredProcedureMonitor.adoc
Merge pull request #158 from indigo423/NMS-6660-doc-jdbcstoredproceduremonitor

NMS-6660: Documentation JdbcStoredProcedureMonitor