[single-profile] Including empty value in base profile template causes misleading error message

[t1m0thyj]

If base profile contains an option with defaultValue undefined and includeInTemplate=true, it will appear in the config template as an empty value. For example:

"my_base": {
  "type": "base",
  "properties": {
    "host": "",
    "port": 443
  }
}

When zowe auth login is run, a misleading error message is returned:

Syntax Error:
No value specified for option:
--host

This option requires a value of type:
string

Option Description:
Host name of service on the mainframe.

Current Behavior In the error message, it sounds like the user did something wrong by omitting an option with required=true, because of the wording "no value specified" and "this option requires a value".

Expected Behavior The error message should clearly explain that a value was provided, but empty values are not allowed for this option. Ideally it could also show the user where the empty value originated from.