subsitute Atomic in the iso volume id

As there is a hard limit for volume id's on isos to be <32 characters,
we have a list of subsitutions that we maintain to make sure that
isos all have volume id's under that size. with the addition of
ppc64le and aarch64 for Atomic host installer the 7 character arch
length pushed us over the limit using AH for Atomic seems the most
logical change to make.

Signed-off-by: Dennis Gilmore <dennis@ausil.us>

fedora-atomic.conf

@@ -185,6 +185,7 @@ image_volid_formats = [
 image_volid_layered_product_formats = []
 # Replace 'Cloud' with 'C' in volume id etc.
 volume_id_substitutions = {
+         'Atomic': 'AH',
         'Rawhide': 'rawh',
          'Images': 'img',
     'MATE_Compiz': 'MATE',

fedora-cloud.conf

@@ -185,6 +185,7 @@ image_volid_formats = [
 image_volid_layered_product_formats = []
 # Replace 'Cloud' with 'C' in volume id etc.
 volume_id_substitutions = {
+         'Atomic': 'AH',
         'Rawhide': 'rawh',
          'Images': 'img',
     'MATE_Compiz': 'MATE',

fedora-docker.conf

@@ -174,6 +174,7 @@ image_volid_formats = [
 image_volid_layered_product_formats = []
 # Replace 'Cloud' with 'C' in volume id etc.
 volume_id_substitutions = {
+         'Atomic': 'AH',
         'Rawhide': 'rawh',
          'Images': 'img',
     'MATE_Compiz': 'MATE',

fedora-modular.conf

@@ -110,6 +110,7 @@ image_volid_formats = [
 image_volid_layered_product_formats = []
 # Replace 'Cloud' with 'C' in volume id etc.
 volume_id_substitutions = {
+         'Atomic': 'AH',
         'Rawhide': 'rawh',
          'Images': 'img',
     'MATE_Compiz': 'MATE',

fedora.conf

@@ -235,6 +235,7 @@ image_volid_formats = [
 image_volid_layered_product_formats = []
 # Replace 'Cloud' with 'C' in volume id etc.
 volume_id_substitutions = {
+         'Atomic': 'AH',
         'Rawhide': 'rawh',
          'Images': 'img',
     'MATE_Compiz': 'MATE',