small_3D_alt7: suppression of the RHCJ option
small_3D_alt8: RHCJ case
The RHCJ case cannot be compared to the reference version because
an incompatible changed has been entered during commit 907e9066

small_3D_alt6: RAHA updraft with the bigaussian pdf
small_3D_alt7: RHCJ updraft with the STAT cloud scheme
               and the LOSIGMAS=F option
Two bug corrections in the original version are needed to run
the small_3D_alt7 test case (corrections described in INSTALL_pack_ial

REPRO48 variable
big_3D case added to ALL case on HPC