--defer-module-loads when testing help

MSP-11671

Changed runtime of `rake cucumber` from average (n=10) of 164.90 seconds to
average (n=10) of 153.29 seconds for a -7.04% decrease.  Raw data:
https://docs.google.com/spreadsheets/d/1vCRi_38Go3Wfq670eDCXMTSSXL1blSbk6NQsgpOqfYw/edit?usp=sharing

Author: limhoff-r7

features/commands/help.feature

@@ -1,7 +1,7 @@
 Feature: Help command
 
   Background:
-    Given I run `msfconsole` interactively
+    Given I run `msfconsole --defer-module-loads` interactively
     And I wait for stdout to contain "Free Metasploit Pro trial: http://r-7.co/trymsp"
 
   Scenario: The 'help' command's output