[NEMO-321] Fix the data skew pass metric mismatch

[sanha]

JIRA: NEMO-321: Fix the data skew pass metric mismatch

Major changes:

• Makes DataSkewRuntimePass access to the partitioning logic by moving Partitioner interface and the implementations from runtime executor to runtime common.
  • The mismatch between the data metric produced by MetricCollectionVertex and the data metric understood by DataSkewRuntimePass is caused by the fact that the partitioning logic is hidden from both components.

Minor changes to note:

• Adds an empty edge from every metric aggregation vertex to the next stage (as a control dependency) to delay the next stage's scheduling. At now, the order of these stages' scheduling depends on luck.
• Fix the location of MetricCollection property.
• Remove the DynamicOptimization property (not needed).
• Re-enable the skewness aware scheduling.

Tests for the changes:

• Existing integration test and unit tests.

Other comments:

• N/A.

Closes #188

[johnyangk]

Thanks @sanha I'll take a look.

[johnyangk]

LGTM.