CLI: Login improvements

[halender]

Some improvements:

1. Login help menu does not show --password as required

Login --password option is required. Autogenerated CLI check this properly but Login help menu does NOT show --password as an option.

cafetero@swdev:~$ ./opencga-client-2.2.0-SNAPSHOT/bin/opencga.sh users login -u [USER] <<< TO_BE_CHANGED
ERROR: The following option is required: [-p | --password]

Usage:   opencga.sh users login [options]

Options:
            -h, --help		Print this help  [false]
                --host	STRING	Use this server host instead of the default one in the client configuration 
       -L, --log-level	STRING	One of the following: 'error', 'warn', 'info', 'debug', 'trace' [info] 
           --no-header		Not include headers in the output (not applicable to json output-format)
                               [false]
    --out-format, --OF	STRING	Output format. one of {JSON, JSON_PRETTY, TEXT, YAML}  [TEXT]
       --refresh-token	STRING	The body web service refreshToken parameter 
           *-u, --user	STRING	User id, this must be unique in OpenCGA 

2. Login only lets input the password interactively. Does not let redirect with <<< neither with echo

[pamag]

Reviewed

version: opencga-client-2.2.0-SNAPSHOT_testing2.tar.gz

• pasword as rediretion <<<'and echo | works!
• user with hyphen
• user with -u still does not work
  

[juanfeSanahuja]

For user authentication we have two ways to do it:

• "Users login" which works the same way as the rest of the commands on the CLI.

Usage:   opencga.sh users login [options]

Options:
            -h, --help		Print this help  [false]
                --host	STRING	Use this server host instead of the default one in the client configuration 
       -L, --log-level	STRING	One of the following: 'error', 'warn', 'info', 'debug', 'trace' [info] 
           --no-header		Not include headers in the output (not applicable to json output-format)
                               [false]
    --out-format, --OF	STRING	Output format. one of {JSON, JSON_PRETTY, TEXT, YAML}  [TEXT]
       *-p, --password		User password 
       --refresh-token	STRING	The body web service refreshToken parameter 
           *-u, --user	STRING	User id, this must be unique in OpenCGA 

• "login" is a shortcut to the users command and requires no options or subcommands. If after login we put the name of the user, it only asks for the password, otherwise it asks for both. No needs -u or -p