Default soiltype namelist option

[mathieulandreau]

Purpose: add a default_soiltype namelist option

TYPE: new feature

KEYWORDS: FEAT: Add a default_soiltype namelist option

SOURCE: Mathieu Landreau (Centrale Nantes)

DESCRIPTION OF CHANGES:
Problem:
When running real.exe, in the land cells where no soiltype is defined in the soil dataset, the type is set to 8=silty clay loam. For high-resolution coastal area simulation, this can represent a certain amount of cells.

Solution:
A namelist option named default_soiltype is added. It is checked (in module_check_a_mundo) that the user-defined value is between 1 and 19 and is not water (19)

LIST OF MODIFIED FILES: list of changed files (use git diff --name-status master to get formatted list)
Registry/Registry.EM_COMMON
dyn_em/module_initialize_real.F
run/README.namelist
share/module_check_a_mundo.F

TESTS CONDUCTED:
I realized this few month ago and didn't try again. It is possible to test with a coastal area case.

[weiwangncar]

The regression test results:

Test Type              | Expected  | Received |  Failed
= = = = = = = = = = = = = = = = = = = = = = = =  = = = =
Number of Tests        : 23           24
Number of Builds       : 60           57
Number of Simulations  : 158           150        0
Number of Comparisons  : 95           86        0

Failed Simulations are: 
None
Which comparisons are not bit-for-bit: 
None