Ensure order of soap arguments based on function signature.

[Bouwdie]

When an associative array is passed it does not use the key for argument order.
This means that the following code passes the last_name as first argument,
whilst in the signature this is the second parameter.

$arguments = [
    'last_name' => 'Lastname',
    'first_name' => 'Firstname',
];

$results = $client->getAdapter()->call('complianceSearchPersons', $arguments);

In this merge request we are leveraging the __getFunctions from the native php soap-client and parse those for argument order.
We order the arguments according to the signature before sending them to the parent __soapCall.
In addition we validate if the method exists and log any arguments that are not in the signature.

[kanariezwart]

@Bouwdie please update your branch with the latest master.

[kanariezwart]

I updated the branch with master. Changes look good to me.