Fix remaining deprecation warnings

Commit d552328 already fixed most
deprecation warnings, but a few were overlooked.

templates/memcached_sysconfig.erb

@@ -6,19 +6,19 @@ CACHESIZE="<%= scope.function_memcached_max_memory([@max_memory]) %>"
 OPTIONS="<%
 result = []
 if @verbosity
-  result << '-' + verbosity
+  result << '-' + @verbosity
 end
 if @lock_memory
   result << '-k'
 end
 if @listen_ip
-  result << '-l ' + listen_ip
+  result << '-l ' + @listen_ip
 end
 if @udp_port
-  result << '-U ' + udp_port
+  result << '-U ' + @udp_port
 end
 if @item_size
-  result << '-I ' + item_size
+  result << '-I ' + @item_size
 end
-result << '-t ' + processorcount
+result << '-t ' + @processorcount
 -%><%= result.join(' ') -%>"