Enforce DNS-1123 resource name compliance on ingest

[Mierdin]

Endpoint names currently have no validation on ingest that forces compliance with kubernetes standards. See below error when trying to create an endpoint name with capital letters.

time="2018-11-06T07:41:26Z" level=error msg="Problem creating pod StackStorm: Pod \"StackStorm\" is invalid: [metadata.name: Invalid value: \"StackStorm\": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*'), spec.containers[0].name: Invalid value: \"StackStorm\": a DNS-1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name',  or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')]"

Validation should be added to all relevant fields in db types that will result in a kubernetes resource name that conforms to this spec.