XD-2397: Fix CNFE in tcp-client module
Update `grunt-contrib-imagemin` to `0.9.2`
XD-2107/1048 SpEL for metric name and counter value in aggregate counters
* XD-2107 - Aggregate counter can increment by SpEL over message
* XD-1048 - Dynamically select metric name using SpEL
* Fix metric name option
* Fix typo and rich-gauge phantom creation