Added rspec tests for plugin disk
Added rspec tests for plugin filecount
Added rspec tests for plugin interface
Added rspec tests for plugin iptables
Added rspec tests for plugin irq
Added rspec tests for plugin memcached
Added rspec tests for plugin snmp
Added rspec tests for plugin tcpconns
Added rspec tests for plugin unixsock
Merge pull request #45 from tripledes/develop

Rspec tests for few plugin classes