allow Process Result retrieval without an Execute execution beforehand to support decoupled components (one doing the execute, the other retrieving the result)
removing the restrictions on WPSClientSession (final class and private constructor) to improve testability, e.g. with Mockito.
pull request with two separate aspects:
WPSClientSession
(final
class andprivate
constructor) to improve testability, e.g. with Mockito.