Lithium snmp4sdn depends on Helium version of dependencies

Autorelease is unable to build snmp4sdn because it incorrectly depends on the Helium version of a few dependencies:

• commons.opendaylight 1.4.4 should be updated to 1.5.0
• sal 0.8.1 should be updated to 0.9.0
• mdsal 1.1 should be updated to 1.2.0
• nsf 0.4.2 should be updated to 0.5.0
• yangtools 0.6.2 should be updated to 0.7.0