MULE-7376: NullPointerException while initialising body
(cherry picked from commit ed06d5c)
MULE-7377: WS Consumer ignores imports in WSDL

Changed the RequestBodyGenerator so that if there is a problem when processing the WSDL, an warning is logged but the component doesn't fail (it assumes that the operation requires parameters and therefore will read the SOAP body from the payload).
(cherry picked from commit 1cfe638)