Add foreman_openstack_satellite_code_exec.rb

This module exploits a code injection vulnerability in the 'create'
action of 'bookmarks' controller of Foreman and Red Hat
OpenStack/Satellite (Foreman 1.2.0-RC1 and earlier).
Add support to CWE in module references
Change URIPATH option to TARGETURI as per review
Check session and CSRF variables as per review
Change print_error/ret to fail_with as per review
Remove call to handler as per review
Fix CSRF regular expressions as per review
Revert "Add support to CWE in module references"

This reverts commit 7a9c2287727de35d86348ec902508f78bce66b78.
Land #2110, @rcvalle's exploit for Foreman Ruby Injection
Clean CWE reference, will ad in new pr