+(*)Eliminate CORRECTION_INTXPA_5PT

  Eliminated the runtime parameter CORRECTION_INTXPA_5PT by always selecting the
code that would have been used if it were true.  This decision was based on the
relative performance of the options with this set to true or false, and on the
desire to maintain consistency with the 5-point Boole's rule quadrature used
elsewhere in the pressure gradient force calculations.  CORRECTION_INTXPA_5PT
was only added in the same PR as this commit, so it can been simply removed and
there is no need to obsolete it.  This will change answers if CORRECTION_INTXPA
or RESET_INTXPA_INTEGRAL are true and CORRECTION_INTXPA_5PT was set to false,
but otherwise answers are bitwise identical.  There are fewer entries in the
MOM_parameter_doc files as a result of this commit.