[#986] improvement(tez): Optimize the method of obtain the vertex id.

[zhengchenyu]

What changes were proposed in this pull request?

Optimize the method of obtain the vertex id.

Why are the changes needed?

For now, vertex id is extract from vertex name. This way only support the vertex name like "Map 0", "Reduce 1", generally generated from hive.
For tez examples, the vertex name is arbitrary, so we can't get the vertex id. So we need a new way to get vertex id.

Fix: #986

How was this patch tested?

integration test, unit test, test in yarn cluster, test in tez local mode.

[codecov-commenter]

Codecov Report

Merging #990 (d0c37b4) into master (3bd2315) will increase coverage by 1.10%.
The diff coverage is 38.00%.

@@             Coverage Diff              @@
##             master     #990      +/-   ##
============================================
+ Coverage     53.39%   54.50%   +1.10%     
+ Complexity     2513     2509       -4     
============================================
  Files           376      356      -20     
  Lines         20521    18192    -2329     
  Branches       1764     1774      +10     
============================================
- Hits          10958     9915    -1043     
+ Misses         8875     7656    -1219     
+ Partials        688      621      -67     

Impacted Files	Coverage Δ
.../java/org/apache/tez/common/InputContextUtils.java	100.00% <ø> (ø)
.../main/java/org/apache/tez/common/RssTezConfig.java	92.85% <ø> (ø)
...library/common/shuffle/impl/RssTezFetcherTask.java	0.00% <0.00%> (ø)
...tez/runtime/library/input/RssUnorderedKVInput.java	0.00% <0.00%> (ø)
.../library/output/RssOrderedPartitionedKVOutput.java	46.15% <0.00%> (-2.07%)	⬇️
...z/runtime/library/output/RssUnorderedKVOutput.java	46.55% <0.00%> (-2.10%)	⬇️
...ibrary/output/RssUnorderedPartitionedKVOutput.java	46.55% <0.00%> (-2.10%)	⬇️
...library/common/shuffle/impl/RssShuffleManager.java	27.12% <50.00%> (ø)
...untime/library/input/RssOrderedGroupedKVInput.java	47.31% <80.00%> (+1.28%)	⬆️
...c/main/java/org/apache/tez/common/RssTezUtils.java	55.67% <100.00%> (-2.92%)	⬇️
... and 3 more

... and 20 files with indirect coverage changes

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[lifeSo]

The change is great !

[jerqi]

Merged to master. Thanks @lifeSo @zhengchenyu