+(*)Changed the default for MEKE_ALPHA_RHINES

  Changed the default value of MEKE_ALPHA_RHINES and MEKE_ALPHA_EADY from 0.05
to 0.0, following the pattern for the defaults for other MEKE parameters.  All
answers in the MOM6-examples test suite are bitwise identical, but this will
change answers in some test cases that use MEKE for diffusivities or viscosities
where MEKE_ALPHA_RHINES or MEKE_ALPHA_EADY are not set explicitly.  There are
changes to the MOM_parameter_doc files.

src/parameterizations/lateral/MOM_MEKE.F90

@@ -1154,11 +1154,11 @@ logical function MEKE_init(Time, G, US, param_file, diag, CS, MEKE, restart_CS)
   call get_param(param_file, mdl, "MEKE_ALPHA_RHINES", CS%aRhines, &
                  "If positive, is a coefficient weighting the Rhines scale "//&
                  "in the expression for mixing length used in MEKE-derived diffusivity.", &
-                 units="nondim", default=0.05)
+                 units="nondim", default=0.0)
   call get_param(param_file, mdl, "MEKE_ALPHA_EADY", CS%aEady, &
                  "If positive, is a coefficient weighting the Eady length scale "//&
                  "in the expression for mixing length used in MEKE-derived diffusivity.", &
-                 units="nondim", default=0.05)
+                 units="nondim", default=0.0)
   call get_param(param_file, mdl, "MEKE_ALPHA_FRICT", CS%aFrict, &
                  "If positive, is a coefficient weighting the frictional arrest scale "//&
                  "in the expression for mixing length used in MEKE-derived diffusivity.", &