Previously if HBASE_CONF_DIR was set then `hbase classpath` was run and
appended to INTERNAL_HADOOP_CLASSPATHS. Now when HBASE_CONF_DIR is set
HBASE_HOME or PATH is checked for 'hbase' and if not found a warning is
printed and INTERNAL_HADOOP_CLASSPATHS is not updated.

This closes #3711

This closes #3725.

This closes #3728.

This closes #3731.

This closes #3694.

This closes #3710.

This closes #3686.

Seems the upload via http is not supported anymore.

This closes #3708.

This is just a safety precaution in case future tests forget to include the
mvn.forkNumber property in the argLine. In that case, the log file would have
been ".log" and omitted from the log files package that is uploaded for further
inspection.

Otherwise, travis file logs end up in the wrong log file, i.e. ".log".

This way, currently executed tests and their failures are properly logged.

This closes #3713.

This closes #3678.

This closes #3717

This closes #3716

Add mutators matching the existing accessors for vertex ID fields.

In tests RMat graphs are now created by calling a function with the
desired scale and edge factor. Also updated the documentation for
generating test graphs using Gelly examples.

This closes #3704

This closes #3702

Fix off-by-one error in 'setPosition' and expand array when seeking
outside the original bounds.

This closes #3595

- The digest of VolcanoRuleMatch matched different table sources with same field names as the same.

This closes #3699.

[FLINK-5545] [table] Remove FlinkAggregateExpandDistinctAggregatesRule after bumping Calcite to v1.12.

This closes #3695.

This closes #3693.

[FLINK-6261] [table] Support TUMBLE, HOP, SESSION group window functions for SQL queries on batch tables.

- Drop support for group window translation of "GROUP BY FLOOR/CEIL".

This closes #3675.

This closes #3683.

This closes #3682.

This closes #3685.

This closes #3684.

Implement object reuse for Flink's Either type by storing a reference to
Right in Left and Left in Right. These references are private and remain
null until set by EitherSerializer when copying or deserializing with
object reuse.

This closes #3680

[FLINK-5435] [table] Remove FlinkAggregateJoinTransposeRule and FlinkRelDecorrelator after bumping Calcite to v1.12.

This closes #3689.

- Add check for sort order of OVER windows.

This closes #3681.

- make file/argument split more readable
- pass on Paths where applicable instead of recreating them every time
- rename PPB#clearPath to more appropriate deleteIfExists
- simplify PPB#copyFile
- simplify PPB#startPython
- use UUID#randomUUID() instead of Random.nextInt()
- remove several invalid exception declarations

- unify python2/python3 configuration
- explicitly pass on a configuration to each operator
- port all configuration options to ConfigOptions
- [FLINK-5516] Make all paths explicitly configurable
- [FLINK-6230] Make mmap size configurable

This closes #3676.

This closes #3677.