[parallel] Optimisation of usage of p_min and p_max

NEWS.txt

sources/api/api.cmdf

sources/artemis/artemis.cmdf

sources/gaia/conlit.f

sources/postel3d/postel3d.cmdf

sources/stbtel/stbtel.cmdf

sources/telemac2d/buse.f

sources/telemac2d/cltrac.f

sources/telemac2d/lecbus.f

sources/telemac2d/telemac2d.cmdf

sources/telemac3d/telemac3d.cmdf

sources/tomawac/tomawac.cmdf

sources/utils/parallel/interface_parallel.f

sources/utils/parallel/p_dsum_array.F

sources/utils/parallel/p_imax_array.F

sources/utils/parallel/p_imin_array.F

sources/utils/parallel/p_isum_array.F

sources/utils/partel/partel.cmdf

sources/utils/partel/partel_para.F

sources/utils/partel/partel_para.cmdf