Provide proper output when cli tool is run with no arguments.

[karcaw]

Pacifica CLI Tool version

0.5.2

Pacifica Core Software versions

pacifica-namespace 0.0.2
pacifica-uploader 0.3.1
pacifica-downloader 0.4.1

Platform Details

Centos 7

Scenario:

Run the pacifica-cli command with no arguments

Steps to Reproduce:

pacifica-cli

Expected Result:

Some sort of help output.

Actual Result:

Error Message!

Traceback (most recent call last):
  File "/.../bin/pacifica-cli", line 33, in <module>
    sys.exit(load_entry_point('pacifica-cli==0.5.2', 'console_scripts', 'pacifica-cli')())
  File "/.../lib/python3.6/site-packages/pacifica/cli/__main__.py", line 159, in main
    return args.func(args, config_data)
AttributeError: 'Namespace' object has no attribute 'func'