This closes #2324

This closes #2209.

Test utilities include the StreamingMultipleProgramsTestBase and StreamingTestEnvironment.

This moves the ITCases for streaming into 'flink-tests' to achieve that.

This closes #2092

Makes the JUnit test utils (TestLogger, retry rules, ...) properly available to
other projects without the 'flink-core' test-jar, via the 'flink-test-utils-junit' project.

Makes the ForkableMiniCluster, TestEnvironment,  and other test utilities available in the 'main'
scope of the 'flink-test-utils' project.

Creates a 'flink-test-utils-parent' project that holds the 'flink-test-utils-junit' and
'flink-test-utils' project.

Also moves some tests between projects and inlines some very simple utility functions in
order to simplify some test jar dependencies.

This closes #2042

This closes #1915

Added missing test dependency to pom.

Pattern in Scala API now uses Option to shield users against null values from the Java API

Added test-jar for build phase to pom.

Removed necessary dependency entry and an overlooked comment.

Added missing comments on FollowedByPattern.

CEPIT test update.

Replace CEP test with a simple test for Scala <-> Java interoperability.

This closes #1905.

Consolidation is done via plugin management.

Closes #1753

- add suffixes
- adapt change-scala-version script

This closes #1529.

0.10-SNAPSHOT continues on branch release-0.10

Closes #851

Closes #753

This closes #497

This closes #454

This closes #275

Removed Disclaimer file
Eliminated unnecessary incubating substrings
Bumped version to 0.9-SNAPSHOT

Fixed JobManagerITCase to properly wait for task managers to deregister their tasks. Replaced the scheduler's execution service with akka's futures. Introduced TestStreamEnvironment to use ForkableFlinkMiniCluster for test execution.

Replacing the EventCollector and the MemoryArchivist.

Finished EventCollector and adjusted ExecutionGraph and ExecutionVertex to register actors as listeners.

The performance of data-intensive jobs using Kryo is probably going to be slow.

Set correct classloader

try to use Kryo.copy() with fallback to serialization copy

This closes #159

- Clean dependencies in flink-streaming connectors

[FLINK-1114] Move scala-style checks to scala projects, change paths to style conifg, to allow isolated building of individual projects.

Also actually use termination criterion in TransitivelClosureNaive
Java example.

Add ConnectedComponentsITCase for Scala Example

Also fix some formatting in the example code

Add WebLogAnalysisITCase for Scala Example

Some minor reformatting of example code and scaladoc.

Add ITCases for TriangleEnumeration Scala Examples

Also fix some formatting and make TriangleEnumerationOpt Scala produce the
same output as the Java version.

Add PageRankITCase for Scala Example

Also fix formatting in PageRank Scala Example.

Fix formatting in EnumTriangles Scala Examples

Remove Old/Deprecated Scala Examples and ITCases

Fix formatting in EnumTrianglesBasic.scala

Fix formatting in LinearRegression Scala Example

Remove old Scala LineRank Code and RelQuery Example

[scala] Fix typo in scaladoc in GroupedDataSet

[scala] Fix Scaladoc of Join and CoGroup Operation

Was still referring to the type of join/coGroup function that returns an
Option.

Fix tab vs. spaces in flink-scala and flink-scala-examples

Don't bother looking at the diff, this is almost a complete rewrite of
the previous Scala API. This uses all the work put into the Java API,
such as TypeInformation, the serializers and comparators and the
operators.

The Scala DataSet and ExecutionEnvironment wrap their respective Java
equivalents. TypeInformation is generated by a macro that uses
TypeInformationGen and other macro support classes. The Java
TypeExtractor is completely bypassed but the TypeInformation and
sub-classes are created by the Scala type analyzer. There is special
support for Scala Tuples in the form of ScalaTupleTypeInfo,
ScalaTupleSerializer, and ScalaTupleComparator.

This also adds tests to flink-scala that are ports of the tests in
flink-java.

There are not yet any Scala specific tests in flink-tests. All the
scala example ITCases are commented out, as well as the examples
themselves. Those will be uncommented once the examples are ported. This
will happen in separate commits.