Fix rspec deprecation

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
One assertion per example

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Fix VCAP::Component::SafeHash

  * class now responds to #class
  * class is now defined within Component, not an instance of one

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Update development gems

Signed-off-by: Eric Malm <emalm@pivotallabs.com>