dns: normalize record type read interactively in dnsrecord_add

When dnsrecord_add is called without options in interactive mode, it
prompts the user to enter a record type. The record type is expected to be
upper case further in the code, which causes non-upper case values not to
work correctly.

Fix this issue by upper casing the value after it is read.

https://fedorahosted.org/freeipa/ticket/6203

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipaclient/plugins/dns.py

@@ -175,6 +175,8 @@ class dnsrecord_add(MethodOverride):
             if rrtype is None:
                 return
 
+            rrtype = rrtype.upper()
+
             try:
                 name = record_name_format % rrtype.lower()
                 param = self.params[name]