Replace '/' in '-' in ipmi names

'/' confuses our '/' delimited namespace.  Use '-'
instead.  '_or_' was considered, but other meanings
could be applied other than '/'.

confluent_server/confluent/plugins/hardwaremanagement/ipmi.py

@@ -58,7 +58,7 @@ def hex2bin(hexstring):
     return bytearray(bytedata)
 
 def simplify_name(name):
-    return name.lower().replace(' ', '_')
+    return name.lower().replace(' ', '_').replace('/', '-')
 
 
 def sanitize_invdata(indata):