Due to this [change](#8018), we need to fix our tests for elasticsearch 1.4.0 and above.

Closes #41.

(cherry picked from commit 75b800f)

The UnicastHostsProvider implementation creates DiscoveryNodes that are used as an initial seed for unicast based discovery. At the moment it uses Version.CURRENT for those DiscoveryNode object, which confuses the backwards compatibility layer to think this nodes are of the latest version. This causes new nodes to fail to join old nodes as the ping serialization goes wrong. Instead we should use version.minimumCompatibilityVersion().

Closes #41.

(cherry picked from commit 9ae29c7)

…galStateException` in favor of the JDK one

Related to #10794

Closes #41.

This is due to `edu.ucar:netcdf` lib which comes from `tika-parsers` dependency.

```
[INFO] +- org.apache.tika:tika-parsers:jar:1.5:compile
[INFO] |  +- edu.ucar:netcdf:jar:4.2-min:compile
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.5.6:compile
```

We can exclude this library from the generated ZIP artifact.

Closes elastic#41.

Update Coordination.md misspelling my group name

This commit moves Legislator from the simplified fake master service interface to use the actual MasterService implementation to submit and execute cluster state update tasks, supporting batching, listeners etc. The commit also reuses the task implementations from Zen1 by making direct reuse of NodeJoinController.JoinTaskExecutor an ZenDiscovery.NodeRemovalClusterStateTaskExecutor, eliminating the code duplication of an earlier commit.

With this commit we remove some unused parameter sources from the eventdata
track and also cleanup unused imports.

Relates elastic#41

…lastic#41)

* Add admin-portal to Engageli AMI

Copy admin-portal build artifact from s3 into Engageli AMI.

Install admin-portal into student app sandbox at boot time via rc.local

Add admin-portal to list of repos to tag

Approved-by: Ofri Peretz
Approved-by: Matan Yemini

Fixes elastic#41