don't route to hbrentshortfall if hb is 7 (#544)

config/forms/2021_2022.json

@@ -5730,14 +5730,6 @@
                   "hb": 6,
                   "household_charge": null
                 },
-                {
-                  "hb": 7,
-                  "household_charge": 0
-                },
-                {
-                  "hb": 7,
-                  "household_charge": null
-                },
                 {
                   "hb": 8,
                   "household_charge": 0

spec/fixtures/softwire_imports/case_logs/166fc004-392e-47a8-acb8-1c018734882b.xml

@@ -82,7 +82,7 @@
       <Preg override-field="">2 No</Preg>
     </Group>
     <Group>
-      <Q6Ben>9 Not in receipt of either UC or HB</Q6Ben>
+      <Q6Ben>7 UC &#x2013; without housing element (not in receipt of HB and tenants not eligible for housing support e.g. residential care home)</Q6Ben>
     </Group>
     <Group>
       <Q7Ben>3 None</Q7Ben>