Pull behavior out of SpecEnvironment initialize

[#72476000]

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>
Rename SpecEnvironment to SpecBootstrap

- Move spec/bootstrap into spec/support/bootstrap

[#72476000]

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>
Move diagnostics_spec so they run as part of the suite

[#73154768]