Remove unused code in redis aggregate counter.
Reworked exception handling code to add more precise causes
Applied changes following mpollack's comments
XD-368: Improve redis connection use in aggregate counter

Implemented as a single action using a RedisCallback.
XD-348 Add fixed delay interval for job execution scheduler task
 Added fixed-delay scheduler task config
 Updated JobPlugin to process module with "fixed-delay" property key
 Added test to check IntervalTask bean is added to the module application context