Merge branch E3SM-Project/whannah/fix-domain-tool-thresholds (PR #8533)

Fix CL options for minimum and maximum land fraction. Provides explicit types for fminval and fmaxval.

[BFB]

Author: brhillman

tools/generate_domain_files/generate_domain_files_E3SM.py

@@ -94,10 +94,12 @@ class clr:END,RED,GREEN,MAGENTA,CYAN = '\033[0m','\033[31m','\033[32m','\033[35m
                   help='Creation date stamp for domain files')
 parser.add_option('--fminval',
                   dest='fminval',
+                  type='float',
                   default=1e-8,
                   help='Minimum allowable land fraction (reset to 0 below fminval)')
 parser.add_option('--fmaxval',
                   dest='fmaxval',
+                  type='float',
                   default=1,
                   help='Maximum allowable land fraction (reset to 1 above fmaxval)')
 parser.add_option('--set-omask',