reduce min space requirements, refs #20771

tests/test_partitions.py

@@ -23,14 +23,14 @@ paths = [
     {
         'mount_point': '/',
         'recommended_types': ('ext4',),
-        'min_size_gbytes': 20,
+        'min_size_gbytes': 15,
         'min_free_size_gbytes': 5,
     },
     {
         'mount_point': '/home/msuser/msinstance',
         'recommended_types': ('ext4', 'nfsv4'),
-        'min_size_gbytes': 20,
-        'min_free_size_gbytes': 5,
+        'min_size_gbytes': 400,
+        'min_free_size_gbytes': 10,
     },
     {
         'type': 'swap',