use parent:: instead of ModelCritera::

[rizwanjiwan]

As recommended in php docs http://php.adamharvey.name/manual/en/keyword.parent.php

#2009

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.97%. Comparing base (3417fea) to head (2951a74). Report is 4 commits behind head on master.

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HEAD has 3 uploads less than BASE

Flag	BASE (3417fea)	HEAD (2951a74)
7.4	4	3
5-max	4	3
agnostic	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #2016       +/-   ##
=============================================
- Coverage     89.25%   73.97%   -15.28%     
  Complexity     8065     8065               
=============================================
  Files           232      232               
  Lines         24550    24550               
=============================================
- Hits          21911    18161     -3750     
- Misses         2639     6389     +3750     

Flag	Coverage Δ
5-max	73.97% <ø> (-15.28%)	:arrow_down:
7.4	73.97% <ø> (-15.28%)	:arrow_down:
agnostic	?
mysql	69.79% <ø> (-0.02%)	:arrow_down:
pgsql	69.84% <ø> (ø)
sqlite	67.79% <ø> (ø)

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[smhg]

@rizwanjiwan would you be willing to reopen this PR? The single change to Propel\Generator\Builder\Om\QueryBuilder seems useful.

If so, please rebase on master and remove the other changes. CI will now run the testsuite correctly so hopefully we can merge it afterwards.

Thank you!