[2.0 Spec] Implement Schema Object.example field #699
Merge pull request #700 from martoe/699

[2.0 Spec] Implement Schema Object.example field #699
Java 8 compile fix

Compilation with Java 8 had failed:
reference to Parameter is ambiguous.
both class java.lang.reflect.Parameter in java.lang.reflect
and interface com.wordnik.swagger.models.parameters.Parameter in com.wordnik.swagger.models.parameters match
Failing unittests (Windows) ignored
Header, cookie, and form parameters should be optional

According to the spec
(https://github.com/wordnik/swagger-spec/blob/master/versions/2.0.md#parameterObject),
only "path" parameters are required by default, while for
all other parameter types the default value is "false".
Implemented vendor-specific fields at Operation and Parameter level
Make response headers available to the code generator (tryout)
Header, cookie, and form parameters should be optional

Unittest fixed