Removal of redundant code files wrf_status_codes.h, wrf_io_flags.h, io_int_idx_tags.h

[islas]

TYPE: bug fix

KEYWORDS: maintenance, cleanup, duplicates

SOURCE: internal

DESCRIPTION OF CHANGES:
Problem:
Several uses of redundant code exist in WRF that convolute the build process, notably :

• wrf_status_codes.h
• wrf_io_flags.h
• io_int_idx_tags.h
  This leads to multiple definitions in various places with potential for conflicting or ambiguous usage throughout the build.

Solution:
Remove duplicate files and consolidate usage to single sources of truth for each file. Adjust source files & build rules that use the respective files

LIST OF MODIFIED FILES:
M external/io_grib1/Makefile
D external/io_grib1/wrf_status_codes.h
M external/io_grib_share/Makefile
D external/io_grib_share/wrf_io_flags.h
D external/io_grib_share/wrf_status_codes.h
M external/io_int/io_int.F90
M external/io_int/io_int_idx.c
M external/io_int/makefile
M external/ioapi_share/wrf_status_codes.h
M frame/module_internal_header_util.F
M frame/module_io_quilt_old.F
M inc/intio_tags.h

TESTS CONDUCTED:

1. Do mods fix problem? Local tests pass and compile without duplicate code and without generating duplicate code
2. Are the Jenkins tests all passing? Yes

RELEASE NOTE:
Removal of redundant code files wrf_status_codes.h, wrf_io_flags.h, io_int_idx_tags.h

[islas]

@dudhia @weiwangncar
At the suggesting of @mgduda I've split #1899 into more digestible PRs addressing individual issues

[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