Replaces recursive concurrent modification resolution by while loop

Turns off stdout-logging of Akka. Sends proper exceptions in ErrorResponse.

Proper stream closing

[FLINK-1607] [tests] Fixes SimpleRecoveryITCase by rebalancing the data sources so that all mappers receive at least one element

[FLINK-1606] [tests] Fixes JobManagerFailsITCase for Akka 2.2.1 by setting gate-invalid-address-for = 5s and quarantine-systems-for = off

package statement was not updated after class movement
also added a missing import

Author: mjsax <mjsax@informatik.hu-berlin.de>

Closes #437 from mjsax/bug_fix_package_statement and squashes the following commits:

1470b0f [mjsax] fixed package statement

[FLINK-1580] [FLINK-1590] [runtime] Various cleanups and improvements in the TaskManager initialization

 - Better checks during TaskManager startup
 - More robust initialization of TaskManager actor system and actor
 - Fix memory accounting during TaskManager startup
 - Better logging for TaskManagers started through YARN
 - Remove command line parameter hacking fro YARN TaskManagers

Also adds various tests for failure behavior during job submission.

[FLINK-1598] [runtime] Better error message when network serialization of records exceeds java heap space.

This closes #431

[FLINK-1515] [gelly] Changed PageRank to use broadcast set provided by numberOfVertices() to read the number of vertices instead of passing it to the constructor.

This closes #402

[FLINK-1515] [gelly] Splitted runVertexCentricIteration into createVertexIteration and runVertexIteration to make VertexCentricIteration object accessible to developers.

Before, translateToDataflow of SingleInputOperator could only return
a single input operator of the lower layer, same for TwoInputOperator.

This change allows translateToDataflow to return more kinds of
operators.

This closes #428.

This closes #411

This closes #381

This closes #379

[FLINK-1499] [runtime] TaskManager sends explicit disconnect message to JobManager in case of shutdown

This closes #423

[Flink-1484] [runtime] JobManager sends an explicit disconnect message to the registered TaskManagers in case of a graceful shutdown.

This closes #422

[FLINK-1584] [runtime][tests] Fixes TaskManagerFailsITCase by replacing the TestingCluster with a ForkableFlinkMiniCluster

This closes #419

Height of information bullets was not equal due to text break.

This closes #425

[FLINK-1585] [tests] Fix mini clusters to respect memory and buffer configurations and improve relative memory computation.