not strictly required, these conversions keep us
up to date with latest rspec conventions and best practices
which will prevent use from having to convert them when they become
deprecated later
MSP-11368
MSP-11143
Remove fastlib as it slows down the code loading process. From the
previous commit, the mean loading for
`METASPLOIT_FRAMEWORK_PROFILE=true msfconsole -q -x exit` was
27.9530±0.3485 seconds (N=10). The mean after removal of fastlib
was 17.9820±0.6497 seconds (N=10). This means an average 35.67%
reduction in boot time.
David Maloney