Clean up several compiler warnings.

This closes #1509

[FLINK-3184] [timeouts] Set default cluster side timeout to 10 s and the client side timeout to 60 s

Add missing param descriptions to FlinkYarnCluster, remove implicit timeout from ApplicationClient

This closes #1468

This closes #1462

[pr-comments] Decrease font size

[pr-comments] Remove docker connector section

This closes #1499.

This closes #1458.

Removed streaming mode lead to wrong arguments being passed.

This closes #1511

This closes #1494

Adds a flag to the ExecutionGraph's IntermediateResult class indicating whether
the result consumers should be deployed eagerly. If true, the consumers are
deployed as soon as the partition is registered at the ResultPartitionManager of
the task manager. In practice, the deployment boils down to updating unknown
input channels of the consumers (because the actual tasks are actually deployed
all at once).

This behaviour is configured in the JobGraph generator and only activated for
streaming programs (StreamingJobGraphGenerator). It only makes sense for
pipelined results.

The motivation is to get down the latency of the first records passing a
pipeline. The initial update of the input channels causes a higher latency.

You can see this effect in the StreamingScalabilityAndLatency class (manual
test).

At the moment, this results in duplicate Akka messages when the first record
is produced (the message travels from the task to the job manager and from the
job manager to task manager, which then will be ignored at the InputGate).

This closes #1503

The README was describing non-existing bash scripts removed several versions ago.

Originally, the user code classloader delegates to the system classloader as parent.
That works in Flink standalone settings, but not when the Flink core classes themselves
 are not loaded with the system classloader (certain embedded setups).

This patch uses as parent the classloader that was used to load the Flink core classes, specificly
"org.apache.flink.runtime.execution.librarycache.BlobLibraryCacheManager.FlinkUserCodeClassLoader.class.getClassLoader()".

This closes #1506
This closes #1507
This closes #1508

  - Removes Apache Commons HTTP Client
  - Removes Apache Commons IO
  - Removes Jettison JSONparser and consolidates tests to use Jackson instead (which is included anyways)

This closes #1510

This closes #1504.

This closes #1495.

 - added BLOCKING flag to FlinkLocalCluster
 - added NullTerminatingSpout and SpoutOutputCollectorObserver plus tests
 - reworked test accordingly
   - set BLOCKING flag for ITCases
   - make infinite spouts finite using NullTerminatingSpout
   - removed sleep time to get stable
 - fixed bug in BoltSplitITCase and SpoutSplitITCase
   - exception in VerifyAndEnrichBolt is swallowed and test would not fail (replaced by errorFlag)
 - reduced sleep-time in BoltSplitITCase and SpoutSplitITCase to reduce testing time
 - fixed WrapperSetupHelperTest
   - reworked to origianl version with more than two inputs
     (was limite to two inputs because more the two inputs per bolt was not supported in between, which is now fixed)
minor code cleanup (removed unused imports, indenting, etc.)
fixed small error in documenation

This closes #1502.

This closes #1492
This closes #1482

[FLINK-3195] [examples] Consolidate batch examples into one project, unify batch and streaming examples under on parent project

  - Add more tests to `StandardScalerITSuite`
  - Refactor `StandardScalerITSuite`

This closes #899.

Netty versions >= 4.0.28.Final contain an improvement by Netty, which slices
a Netty buffer instead of doing a memory copy (https://github.com/netty/netty/issues/3704)
in the LengthFieldBasedFrameDecoder. In some situations, this interacts badly
with our Netty pipeline leading to OutOfMemory error.

To reproduce, run batch WordCount with a range partitioner and reasonably large
data.

This closes #1471

This closes #1477