Extend jsonrpc2 module tests
Check that we don't allow the same service multiple times
Check that we can have more services for same api with diff name and/or description
Check that we can search registered services

Jira issue: WP-699
Whitespace fixes

Jira-issue: WP-699
Don't return service if service id doesn't match

Fix registry to not return any service if searched id doesn't exist.
Update tests to check for this.

Jira-issue: WP-699
Merge pull request #4 from aldafu/WP-699-more-tests

Wp 699 more tests