Replace wsdl options forceSoap12Headers with correct design

[rashmihunt]

• Removed wsdl option 'forceSoap12Headers' setting. Added code to figure out if the request, response and fault envelope should use soap 1.1 or soap 1.2 based on the binding from the WSDL.
• Fixed request/response/fault path.
• Fixed tests to invoke correct operation if multiple bindings point to same operation.
• Fixed 1.2 to show correct soap 1.2 namespace in request/response/fault.
• Cleanup of examples with minor fixes.

@raymondfeng PTAL

[rashmihunt]

Closing this pull request without merging 'forceSoap12Headers' changes because squashing of previous commits from previous PR didn't delete the commits from this branch even though it squashed and merged all the changes from into 'master'. Deleting this branch as well since it's at a unstable state. Will open another PR for forceSoap12Headers changes in a new branch.