[cleaner] Skip obfuscation of substrings for hostnames properly

Leftover from #3403 / #3496 where match_full_words_only is ignored for
hostname mapping due to own get_regex_result method.

Relevant: #3593
Resolves: #3850

Signed-off-by: Pavel Moravec <[email protected]>

sos/cleaner/mappings/hostname_map.py

@@ -87,7 +87,7 @@ def get_regex_result(self, item):
         """
         if '.' in item:
             item = item.replace('.', '(\\.|_)')
-        return re.compile(item, re.I)
+        return super().get_regex_result(item)
 
     def set_initial_counts(self):
         """Set the initial counter for host and domain obfuscation numbers