ChrisJohnRiley fix for sap_service_discovery

[jvazquez-r7]

I'm doing this pull request on behalf of Chris John Riley since he isn't able to do pull request atm. Short history: it tries to avoid repeated on the scanned ports because of wildcars:

Verification

• Run the module, there shouldn't be results (ports) twice:

msf auxiliary(sap_service_discovery) > run

[*] [SAP] Beginning service Discovery '10.20.37.51'

[+] 10.20.37.51:3200     - SAP Dispatcher sapdp00 OPEN
[+] 10.20.37.51:8100     - SAP Message Server [HTTP] OPEN
[+] 10.20.37.51:50013    - SAP StartService [SOAP] sapctrl00 OPEN
[+] 10.20.37.51:3900     - ITS AGate sapavw00_<INST> OPEN
[+] 10.20.37.51:3601     - SAP Message Server sapms<SID>01 OPEN
[+] 10.20.37.51:3299     - SAP Router OPEN
[+] 10.20.37.51:7200     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7269     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7210     - LiveCache MaxDB (formerly SAP DB) OPEN
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

• Before this pull request you could get the same port two times in results because of wildcards:

msf auxiliary(sap_service_discovery) > run

[*] [SAP] Beginning service Discovery '10.20.37.51'

[+] 10.20.37.51:3200     - SAP Dispatcher sapdp00 OPEN
[+] 10.20.37.51:8100     - SAP Message Server [HTTP] OPEN
[+] 10.20.37.51:50013    - SAP StartService [SOAP] sapctrl00 OPEN
[+] 10.20.37.51:3900     - ITS AGate sapavw00_<INST> OPEN
[+] 10.20.37.51:3299     - SAP Router OPEN
[+] 10.20.37.51:7210     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7269     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7200     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:3601     - SAP Message Server sapms<SID>01 OPEN
[+] 10.20.37.51:7269     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7210     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:7200     - LiveCache MaxDB (formerly SAP DB) OPEN
[+] 10.20.37.51:3299     - SAP Router OPEN
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed