Metasploit::Version::CLI constant specs

MSP-11103
Test install command order

MSP-11103
Remove dead code

MSP-11103
Don't use no_commands

MSP-11103

Make helper methods private instead of using no_commands block as YARD
doesn't know methods in no_commands blocks are normal methods and so
doesn't flag them as needing documentation.
CLI#ensure_development_dependency specs

MSP-11103
CLI#gemspec_path specs

MSP-11103