Migrate task mapping from the stack manager config file to the stack manager cloud lambda function

[mbloch1986]

The Stack Manager Lambda function is currently using a Configuration file to map a specific stack manager task to the related SSM Document. This makes the stack manager cloud lambda function still to undynamic, e.g. when you add new commands you always need to update the ansible module for creating the configuration file. To improve the dynamic of the stack manager cloud lambda function we can add this task mapping to the lambda function to lookup the related ssm document once the lambda function get's executed. This will give\ the users the opportunity to create his own custom SSM Document stack and they is still able to use the AEM Stack Manager Cloud Lambda functions.