chatty warnings running tool-scripts post-processing unit tests

[portante]

Testing bench-scripts/postprocess/uperf-postprocess under sample uperf-0 ...
/usr/share/perl5/vendor_perl/JSON.pm
2.90
agent/tool-scripts/postprocess/unittests: line 104: ./perl-JSON-version: No such file or directory
PASS - uperf-0
Testing bench-scripts/postprocess/uperf-postprocess under sample uperf-1 ...
/usr/share/perl5/vendor_perl/JSON.pm
2.90
agent/tool-scripts/postprocess/unittests: line 104: ./perl-JSON-version: No such file or directory
PASS - uperf-1
Testing bench-scripts/postprocess/uperf-postprocess under sample uperf-2 ...
/usr/share/perl5/vendor_perl/JSON.pm
2.90
agent/tool-scripts/postprocess/unittests: line 104: ./perl-JSON-version: No such file or directory
PASS - uperf-2
Testing bench-scripts/postprocess/uperf-postprocess under sample uperf-3 ...
/usr/share/perl5/vendor_perl/JSON.pm
2.90
agent/tool-scripts/postprocess/unittests: line 104: ./perl-JSON-version: No such file or directory
PASS - uperf-3

[portante]

Encountered while running the unit tests for PR #199.

[ndokos]

PR #295