apache / carbondata / 1937

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[HOTFIX] Fix NPE on windows

Analyse
carbon index files are merged but SegmentFile did not update, so it fails to get any default datamap for pruning.

The reason for no updated is about path comparison like
/[your_path_here]/examples/spark2/target/store/default/source/\Fact\Part0\Segment_0
vs
D:/[your_path_here]/examples/spark2/target/store/default/source/Fact/Part0/Segment_0

Solution
use the AbsoluteTableIdentifier of table from CarbonMetadata
instead of the newly created object, keep the path style same

This closes #3377

2 of 2 new or added lines in 1 file covered. (100.0%)

65816 of 83809 relevant lines covered (78.53%)

1.04 hits per line