Add additional client stubs + tests for calling the UserApi/SearchApi

[jfiala]

Todos for each language

1. Start up user-rest-service-1.0.2
2. Generate client stubs for the language using Swagger-Codegen, Branch develop-2.0
3. Add a simple test case calling the API
   • UserApi ==> UserApi_get_Test, UserApi_post_Test
   • UserResponseEntityApi ==> UserResponseEntityApi_Test
   • SearchApi ==> SearchApiTest
4. Add Assertions for alle the attributes at the UserApi (see GetUserTest.java: https://github.com/jfiala/swagger-spring-demo/blob/master/user-rest-service-1.0.2-client-java-codegen-develop-2.0/src/test/java/at/fwd/swagger/spring/demo/user/GetUserTest.java)
5. Send a PR for a new subproject: user-rest-service-1.0.2-client--codegen-develop-2.0
6. Redo 1-5 using user-rest-service-2.0.0
7. Check language as done below:

   Tested Languages

i.e. Tests for 1.0.2 + 2.0.0 with Codegen develop-2.0 are supplied in the demo project

• [x] Java
• [x] PHP
• [ ] Android
• [ ] Async-Scala
• [ ] C#
• [ ] Groovy
• [ ] Jax-RS
• [ ] nodejs
• [ ] objc
• [ ] python
• [ ] ruby
• [ ] scala
• [ ] scalatra
• [ ] tizen

[jfiala]

see generated client code stubs at: https://github.com/jfiala/swagger-spring-demo/tree/master/user-rest-service-1.0.2/generated-code