Aux doesn't have rand_text_alpha

Author: Meatballs1

lib/msf/core/exploit/smb/psexec.rb

@@ -36,7 +36,7 @@ def initialize(info = {})
   # @return service_name [String] the name of the service.
   def service_name
     @service_name ||= datastore['SERVICE_NAME']
-    @service_name ||= rand_text_alpha(8)
+    @service_name ||= Rex::Text.rand_text_alpha(8)
   end
 
   # Retrieve the SERVICE_DISPLAY_NAME option, generate a random
@@ -45,7 +45,7 @@ def service_name
   # @return service_display_name [String] the display name of the service.
   def display_name
     @display_name ||= datastore['SERVICE_DISPLAY_NAME']
-    @display_name ||= rand_text_alpha(16)
+    @display_name ||= Rex::Text.rand_text_alpha(16)
   end
 
   # Retrieve the SERVICE_DESCRIPTION option