[Spring] Add @CucumberContextConfiguration annotation

[rasklaad]

Summary

To make Cucumber aware of your test configuration you can annotate a
configuration class with @CucumberContextConfiguration and with one of the
following annotations: @ContextConfiguration, @ContextHierarchy or
@BootstrapWith. If you are using SpringBoot, you can annotate configuration
class with @SpringBootTest(classes = TestConfig.class).

Details

• Spring backend minimum implementation
• Spring backend tests
• Docs/javadocs

Motivation and Context

Fixes: #1896

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• I've added tests for my code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[coveralls]

Coverage increased (+0.03%) to 85.975% when pulling bc29621 on spring-without-dummy-method into 1648fb9 on master.

[mpkorstanje]

Don't worry about revapi failing the build right now. It's a semantic version checker. You can ignore it, I'll adjust the version numbers.

[mpkorstanje]

Looks good!

Could you also update spring/README.md to include this information?

[mpkorstanje]

And we're done. Thanks you very much!