Fixing issue 1284 and --no-ssh-password paramater handling logic

Reference: 
https://github.com/Azure/azure-sdk-tools-xplat/issues/1284
https://github.com/Azure/azure-sdk-tools-xplat/issues/658
https://github.com/Azure/azure-sdk-tools-xplat/issues/1003
https://github.com/Azure/azure-sdk-tools-xplat/issues/1041
You set this field to the string `'false'` here, but on line 3267 below you set it to the Boolean value `true`. Should this really be flipping data types like this?