lib/tasks: added a task to create users
lib/tasks: added a task to create users

See issues #179 and #283

Signed-off-by: Miquel Sabaté Solà <b4d70704b9e7df580cab34510621dbd0aacb2dfd@suse.com>

krishnak9/Portus,mssola/Portus,vpereira/Portus,vpereira/Portus,angry-tony/Portus-20170827,kwk/Portus,jloehel/Portus,vpereira/Portus,SUSE/Portus,mssola/Portus,angry-tony/Portus-20170827,kwk/Portus,mssola/Portus,SUSE/Portus,jloehel/Portus,krishnak9/Portus,kwk/Portus,krishnak9/Portus,SUSE/Portus,angry-tony/Portus-20170827,mssola/Portus,jloehel/Portus,krishnak9/Portus,angry-tony/Portus-20170827,SUSE/Portus