Added 'Max Hosts' field in the Add/Edit Organization view

* max hosts field is enabled is user is superuser, otherwise it is disabled and default is 0
 * OrganizationForm tests added for max hosts input
 * minMaxValue added in validators to validate user input for max hosts

Signed-off-by: catjones9 <catjones@redhat.com>

src/pages/Organizations/screens/Organization/OrganizationDetail.jsx

@@ -78,7 +78,7 @@ class OrganizationDetail extends Component {
           />
           <Detail
             label={i18n._(t`Max Hosts`)}
-            value={''+max_hosts}
+            value={`${max_hosts}`}
           />
           <Detail
             label={i18n._(t`Ansible Environment`)}