Updated the service name to be optional, mostly matching the cli arguments
with v3 service create.
Implemented the following changes on service create:
- if only a single positional is present, it's a <type>.
This is not currently legal so it is considered a new case.
- if --type option is present the positional is handled as <name>;
display deprecation message
- if --name option is present the positional is handled as <type>.
Making --type optional is new, but back-compatible
- Made --name and --type mutually exclusive.
- only '--name <service-name> <type>' shall appear in the help output
Change-Id: I8fd4adba3d8cd00d5a8cacc2c494d99d492c45a3
Closes-Bug: #1404073