Test update to provide required dependencies for ServiceRestClient instance.
Using the proper way to get DependencyPresenceOnStartupVerifier bean in a test.
Creation of wrapper class for predefined HTTP headers in JSON configuration.
ServiceConfigurationResolver bean added to test configuration.
Using PredefinedHttpHeaders to set up default headers in HTTP request.
Using static import of NO_PREDEFINED_HEADERS constant for better readability of the code.
Test case for exception thrown when version parameter in dependency is not specified and is required to create Content-Type header.
Test cases for setting custom headers and Content-Type header.