Update error code pattern suffix to include numbers i.e. SVC-S3ERR

[hansenmc]

The current error-code pattern only has upper-case alpha suffix, so it misses Error codes, such as SVC-S3ERR that contain a number.

https://github.com/marklogic-community/marklogic-monitoring-for-splunk/blob/master/src/main/resources/default/props.conf#L33