Fix setKeyType for composite key
Add unit tests for set key type of SerializerPackageImpl
Fix issue #145
Fix reconnect after first failure
Adjust rety delay for unit test
Stupid unit test
Fix da unit test
Ignore bad unit test
Ignore bad unit test
Gradle Release Plugin - pre tag commit:  'astyanax-1.56.19'.
Gradle Release Plugin - new version commit:  'astyanax-1.56.20-SNAPSHOT'.
Improvements to TaskScheduler API

Fix some time calculation and sharding bugs
Add structured metadata to task values
Support for priority
API to create the task CF from the TaskScheduler interface
Improvmenets to Scheduler lock performance and uniqune sharding
Major improvment to lock algorithm to greatly improve lock latency
during periods of contention.  Store scheduler queue metadata in a row
so the configuration can be retrieved at consumer startup.
Test should be ingnored for now
Fix Runnable execution in all rows query to properly interleave different ranges when the number of threads in the pool is less than the number of token ranges
Extract separate Consumer and Producer tasks from the Scheduler interface
Update unit tests for scheduler
Add dependency on jackson
Fix setKeyType for composite key