Fixesspring-projects/spring-integration-aws#70
* Following the AWS Kinesis recommendation about some sleep interval in
between request to the Kinesis service, add `idleBetweenPolls` option
to the `KinesisMessageDrivenChannelAdapter` to sleep in the
`ConsumerDispatcher` main loop after each execution cycle
* Make default `recordLimit` as `10000` - to fetch as much as possible
data per one GetRecords request
* Change `Lock` and `Condition` in the `ConsumerInvoker` to the
`Semaphore`.
We really may release permit from the `ShardConsumer` to perform
the `ConsumerInvoker` cycle before stepping in that cycle
409bfd9533