bulk refresh and update mapping cluster events
try and bulk as much as possible refresh and update mapping events, so they will all be processed at a single go, resulting in less cluster change events, and also reduce the load of multiple changes to the same index
also, change the prio for those to HIGH, since we want URGENT ones (like create index, delete index) to execute
better logging on failure to create index
if the index already exists, trace log it, since it might happen as a result of multiple index requests at the same time creating the index, all other ones, should be debug and not warn in the same spirit of other APIs
FuzzyLikeThisFieldQueryBuilder now defaults failOnUnsupportedField to true, to be consistent with REST API.

Closes #3374
don't xcontent locale if its ROOT for date since its the default
We should wait until the first blocking task is actual being executed.
The pending tasks can be returned out of order.
Cut over to JUnit & Randomized Runner from TestNG

For better integration with the Lucene Test Framework and the
availabilty of RandomizedRunner / Randommized Testing this commit
moves over from TestNG to JUnit.
This commit also moves relevant places over to RandomzedRunner for
reproduceability and removes copied classes from the Lucene Test
Framework.
use host address instead of host name in tests to not do host lookup
make base classes tests abstract
(for intellij)
extra space...
Fix test-bug that produced ordinals with gaps
only process an internal refresh mapping once
we only need to process a refresh on an index/type tuple once even if there are several pending, optimize to not do it several times
Add Git build info when we build a distribution
closes #3370
Fixed testConcurrentAddingAndRemovingWhilePercolating test
process internal refresh/update mapping events per index
this allows us to only create the index (if needed) for the exact duration it is needed, and not across processing of all the events
Mapping: Allow to update/merge the dynamic flag
Allow to update / merge in the dynamic flag on object or the root object mapper, meaning that it can be changed dynamically using the update mapping API.
closes #3384