mmlicense: do not check against "requiredLicense" field

When a new node is added for the first time to GPFS (without specifying
a license on mmaddnode), the Host probably gets assigned the "client"
license by default.
Now if you want to designate the Host as a server afterwards, this check
would prevent you to do so, since by default the "requiredLicense" is
set to "client".
This check isn't really needed anyway, because I assume one can just
treat the "requiredLicense" field in mmlslicense as a "hint". The only
thing that matters is the designatedLicense.

Additionally, GPFS will somehow anyway rewrite this internally at some
point. Recently added a new node and designated it as "server".
mmslicense shows "client" for "requiredLicense" and "server" for
"designatedLicense" as expected. Some time later, mmlslicense showed
"server" as "requiredLicense", and "fpo-server" for "designatedLicense".

library/mmlicense.py

@@ -50,7 +50,6 @@ def main():
 
     for row in mmls_xsv:
         if row['nodeName'] == node:
-            current['required'] = row['requiredLicense']
             current['designated'] = row['designatedLicense']
             break
 
@@ -60,16 +59,6 @@ def main():
             mmlslicense=mmls,
         )
 
-    if lic != current['required']:
-        module.fail_json(
-            msg="%s target %s license does not match required %s license" % (
-                node,
-                lic,
-                current['required']
-            ),
-            mmlslicense=mmls,
-        )
-
     changed = lic != current['designated']
 
     # -------------------------------------------------------------------------