Adding MPI parallelization to CFBM

[pedro-jm]

TYPE: bug fix

KEYWORDS: MPI parallelization with CFBM

SOURCE: Pedro Jimenez (NCAR/RAL)

DESCRIPTION OF CHANGES:
Problem:
MPI parallelization with CFBM only run with 1 MPI task.
It also adds the bilinear interpolation of atmospheric variables in the fire grid.

Solution:
We have allowed for parallelization using multiple MPI tasks.

ISSUE: N/A

LIST OF MODIFIED FILES:
M Registry/Registry.EM_COMMON
A doc/README.cfbm
M dyn_em/module_first_rk_step_part1.F
M dyn_em/start_em.F
M phys/fire_behavior
M share/module_check_a_mundo.F

TESTS CONDUCTED:

1. We run test with 1, 2, and 3 MPI tasks and we get bit for bit results

2. Are the Jenkins tests all passing? Yes
   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

RELEASE NOTE: Allowing for multiple MPI tasks when running the Community Fire Behavior model

[islas]

@pedro-jm I think it may be worth adding a doc/README.cfbm, even if simple. That way we can capture that right now it is limited to one domain, and any other caveats that should be noted.

Otherwise, this looks fairly clean!

[pedro-jm]

@islas I just pushed the README.cfbm. I also mentioned one needs to compile with cmake and put some info on how to do it.

[dudhia]

Not sure why this regtest has not completed yet.

[weiwangncar]

@dudhia Changing text files do not start a reg test. The last successful regtest is from commit f1dcff7.

The regression results for this commit is pass.

[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