Bug fix for overwriting of LCZ urban cells in LU_INDEX with default USGS urban category.

[lpilz]

TYPE: bug fix

KEYWORDS: LCZ, USGS

SOURCE: Lukas Pilz (Heidelberg University)

DESCRIPTION OF CHANGES:
Problem:
As shown in #2152, for USGS data the wrfinput LU_INDEX field has major differences to the met_em LU_INDEX field. Cells in LU_INDEX which have LCZ categories (>30) were overwritten with the default USGS urban category (1) where FRC_URB2D > 0.5.

Solution:
Add a check similar to the MODIS case above.

ISSUE:
Fixes #2152

LIST OF MODIFIED FILES:
M dyn_em/module_initialize_real.F

TESTS CONDUCTED:

1. Did local tests, the only differences between wrfinput and met_em which remain are changing LU_INDEX 28 to 16, which is a water body redesignation as to my knowledge.
2. Jenkins tests have passed.

RELEASE NOTE: Bug fix for wrfinput where LCZ urban cells in LU_INDEX were overwritten with default USGS urban category.

[lpilz]

Sorry about that, it was late...

[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

[dudhia]

looks safe