MSP-11130
Some constants can be leaked before suite if module are loaded during
spec loading, such as if a framework instance in made in the context
body of a spec instead of in a before callback.
MSP-11130
`Metasploit::Framework::Spec::Constants::Each.configure!` will set up an
`after(:each)` callback that will fail the example if there are leaked
constants. Leaked constants are cleaned up to prevent misattribution.
MSP-11130
`Metasploit::Framework::Spec::Constants::Suite` extracts out
`LOG_PATHNAME`, `configure!`, and `define_task` as those piece are
specific to handling constant leaks for the entire suite. This is in
preparation for `Metasploit::Framework::Spec::Constants::Each`.