antool: correct test for realpath()

[ldorau]

Move testing pmem paths to fault injection tests, because the 'dir_pmem.txt' file can be regenerated and modified.

Remove also incorrect check from realpath().

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This change is 

[codecov[bot]]

Codecov Report

Merging #370 into master will increase coverage by 0.03%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #370      +/-   ##
==========================================
+ Coverage   76.94%   76.98%   +0.03%     
==========================================
  Files          67       67              
  Lines        8228     8228              
  Branches     1649     1649              
==========================================
+ Hits         6331     6334       +3     
+ Misses       1488     1487       -1     
+ Partials      409      407       -2

Flag	Coverage Δ
#ltp_tests	46.59% <ø> (+0.03%)	:arrow_up:
#sqlite_tests	45.34% <ø> (+0.01%)	:arrow_up:
#tests_antool	14.77% <100%> (ø)	:arrow_up:
#tests_posix_multi_threaded	25.54% <ø> (-0.1%)	:arrow_down:
#tests_posix_single_threaded	54.26% <ø> (ø)	:arrow_up:
#tests_preload	44.8% <ø> (-0.06%)	:arrow_down:

Impacted Files	Coverage Δ
src/tools/antool/listsyscalls.py	99.43% <100%> (ø)	:arrow_up:
src/libpmemfile-posix/file.c	74.86% <0%> (-0.28%)	:arrow_down:
src/libpmemfile-posix/inode.c	88.65% <0%> (+0.34%)	:arrow_up:
src/libpmemfile-posix/dir.c	85.5% <0%> (+0.49%)	:arrow_up:
src/libpmemfile/path_resolve.c	90.47% <0%> (+0.59%)	:arrow_up:

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[krzycz]

Reviewed 3 of 3 files at r1. Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[sarahjelinek]

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Reviewed 3 of 3 files at r1. Review status: :shipit: all files reviewed at latest revision, all discussions resolved, all commit checks successful.

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Comments from Reviewable