Avoid magic number to make @wvu marginally happier

lib/msf/ui/console/command_dispatcher/core.rb

@@ -101,6 +101,9 @@ class Core
   # Constant for disclosure date formatting in search functions
   DISCLOSURE_DATE_FORMAT = "%Y-%m-%d"
 
+  # Constant for a retry timeout on using modules before they're loaded
+  CMD_USE_TIMEOUT = 3
+
   # Returns the list of commands supported by this command dispatcher
   def commands
     {
@@ -2421,7 +2424,7 @@ class Core
       mod = framework.modules.create(mod_name)
       unless mod
         # Try one more time; see #4549
-        sleep 3
+        sleep CMD_USE_TIMEOUT
         mod = framework.modules.create(mod_name)
         unless mod
           print_error("Failed to load module: #{mod_name}")