Case-sensitive resource matching

[ajmyyra]

Environment (required):

• OS: Linux
• Version 1.1.1

Describe the bug
It is possible to use upctl with resource names. Only problem is that the names are case-sensitive, which is an annoying UX issue.

To Reproduce
Steps to reproduce the behavior:

$ upctl network list

 UUID                                   Name                    Router   Type      Zone    
────────────────────────────────────── ─────────────────────── ──────── ───────── ─────────
 03f20361-e744-4892-acf6-67d1ad1023aa   Kubernetes                       private   de-fra1 

$ upctl network show kubernetes

ERROR: cannot resolve argument: nothing found matching 'kubernetes'

$ upctl network show Kubernetes
  
  Common
    UUID:   03f20361-e744-4892-acf6-67d1ad1023aa 
    Name:   Kubernetes                           
    Router:                                      
    Type:   private                              
    Zone:   de-fra1
    etc etc

Wanted behavior
Make name-matching case-insensitive, both in name searches as well as when tab completing (can be completed to correctly cased option)