Add option -SKIP to skip test cases

[rfdavid]

This PR implements -SKIP capability to be added in the test header or an individual test case. It follows the GTest framework by adding the prefix DISABLED_ above the test name.

Example:

# To skip the whole file, add -SKIP in any place after -GROUP and before the end of the header --
-GROUP TinySnbUpdateTest
-DATASET tinysnb
-SKIP

# or to skip test cases individually, add -SKIP below -CASE

-CASE SetNodeListOfLongStringPropTest
-SKIP
-STATEMENT MATCH (a:person) WHERE a.ID=0 SET a.usedNames=['abcndwjbwesdsd','microsofthbbjuwgedsd']
---- ok
-QUERY MATCH (a:person) WHERE a.ID=0 RETURN a.usedNames
---- 1
[abcndwjbwesdsd,microsofthbbjuwgedsd]

Will be shown in the test report:

...
527/686 Test #527: TinySnbUpdateTest.SetNodeListofListPropTest .....................................................................***Not Run (Disabled)   0.00 sec
...
100% tests passed, 0 tests failed out of 680

Total Test time (real) = 136.72 sec

The following tests did not run:
	490 - TinySnbUpdateTest.InsertNodeWithListTest (Disabled)
	505 - TinySnbUpdateTest.SetNodeListOfLongStringPropTest (Disabled)
	506 - TinySnbUpdateTest.SetNodeListOfShortStringPropTest (Disabled)
	508 - TinySnbUpdateTest.SetNodeListOfIntPropTest (Disabled)
	527 - TinySnbUpdateTest.SetNodeListofListPropTest (Disabled)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e3fff3a) 91.93% compared to head (b723cf8) 91.93%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1603   +/-   ##
=======================================
  Coverage   91.93%   91.93%           
=======================================
  Files         704      704           
  Lines       25567    25567           
=======================================
  Hits        23504    23504           
  Misses       2063     2063           

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[ray6080]

As we discussed, rename _SKIP to SKIP_LINE.