"Without --yaml, MSF_DATABASE_CONFIG wins" --execute-command

MSP-11671

Pass `--execute-command exit` to `msfconsole` instead of running it
interactively and typing `exit`.  Average (n=10) runtime for `rake
CUCUMBER_OPTS="-r features"
FEATURE=features/msfconsole/database_yml.feature:54 cucumber:boot`
change from 138.84 seconds to 52.96 seconds (-61.85%).

Author: limhoff-r7

features/msfconsole/database_yml.feature

@@ -82,9 +82,7 @@ Feature: `msfconsole` `database.yml`
         database: project_metasploit_framework_test
         username: project_metasploit_framework_test
       """
-    When I run `msfconsole --environment test` interactively
-    And I wait for stdout to contain "Free Metasploit Pro trial: http://r-7.co/trymsp"
-    And I type "exit"
+    When I run `msfconsole --environment test --execute-command exit`
     Then the output should contain "environment_metasploit_framework_test"
 
   Scenario: Without --yaml or MSF_DATABASE_CONFIG, ~/.msf4/database.yml wins