without this change it's impossible to use Rest Assured 3.0 with Spring Cloud Contract. That's because we are adding Rest Assured 2.0 imports.
with this change we detect Rest Assured version. If 3.0 is available on the classpath we change the imports
fixes#266
without this change the user was forced to use a single base class for all of the generated tests. It could become problematic after some time.
With this change we provide a range of options of providing different base classes for different contracts.
fixes#16
