SDK throws error on asynchronous workflow execution

[ksatzke]

Context:

when calling execute_async in https://github.com/knix-microfunctions/knix/blob/master/mfn_sdk/mfn_sdk/workflow.py,
it throws "AttributeError: 'MfnClient' object has no attribute 'host'" on bare metal installation when executing:

return Execution(self.client, self.client.host+r.headers['Location'])

Expected Behaviour

execute_async should return an object usable for querying for asynchronous execution results

[iakkus]

I think this might have already been fixed in the 'develop' branch.

Need a test to check that.

[ksatzke]

just checked out develop branch to check - does not fix, the same statement now throws "KeyError: 'location'".

[iakkus]

Test added and fixed in 'develop'.

[manuelstein]

Test added and fixed in 'develop'.

I had also started working on this and fixed different things in frontend.go.
You've pushed this to k-list, can we merge this?