ZEN-8484: Warn users when the zep trigger rule cache is full
Merge pull request #18 from zenoss/feature/ZEN-8484

ZEN-8484: Warn users when the zep trigger rule cache is full
ZEN-11855: Address ZEP performance issues around concurrency

Conflicts:
	core/src/main/java/org/zenoss/zep/index/impl/EventIndexMapper.java
	core/src/main/java/org/zenoss/zep/index/impl/QueryBuilder.java
	core/src/main/resources/zeneventserver.conf
	core/src/test/java/org/zenoss/zep/index/impl/EventIndexDaoImplIT.java
	src/core/protocols/java/amqp-samples/src/main/java/org/zenoss/amqp/samples/ProducerTest.java
Merge pull request #19 from zenoss/concurrency_perf_fix

ZEN-11855: Address ZEP performance issues around concurrency
ZEN-12470 - Upgrade Lucene to 4.7.2 for ZEP
Merge pull request #20 from zenoss/feature/lucene_472

ZEN-12470 - Upgrade Lucene to 4.7.2 for ZEP
Fixes ZEN-12762: NPE when closing/acking events
Merge pull request #21 from zenoss/ZEN-12762

Fixes ZEN-12762: NPE when closing/acking events
ported from 4.x
Merge pull request #22 from zenoss/feature/ZEN-9814

ported from 4.x
ported from 4.2.4
Merge pull request #23 from zenoss/feature/ZEN-11023

ported from 4.2.4
ZEN-10425: Closing events clears the owner fields
Merge pull request #24 from zenoss/feature/ZEN-10425

ZEN-10425: Closing events clears the owner fields
add details for flapping events
Merge pull request #25 from zenoss/feature/ZEN-10784

ported from 4.2.4
NIOFSDirectory changed to MMapDirectory
Merge pull request #26 from zenoss/feature/ZEN-12838

NIOFSDirectory changed to MMapDirectory
ZEN-13008: ported from ZEN-13018
Merge pull request #27 from zenoss/feature/ZEN-13008

ZEN-13008: ported from ZEN-13018