Handle the case were there is a possible unsupported AD-SAL Openflow1.0 plugin in Karaf

There is a set dependency on the ADSal Openflow1.0 plugin when we use -OF10 option in opendaylight controller command-line.

There is a good possibility that the adsal openflow1.0 plugin may not be part of Karaf release. Given that, we should handle that possibility.

Opening this bug to handle this scenario.