[improve] check if the domain is created, otherwise raise an error

[opensas]

[opensas]

error when no domain is created

~ Contacting openshift...
~
~ ERROR - error contacting openshift...
~ A user with rhlogin 'sscarano@gmail.com' does not have a registered domain. Be sure to run rhc-create-domain before using the other rhc tools.
~ error executing: rhc-domain-info --apps --rhlogin=sscarano@gmail.com --password=redsas (return code 99)

[opensas]

al especificar un namespace existente:

sas@ubuntu:~/devel/apps/experiment$ rhc-create-domain -l sscarano@gmail.com -p redsas -n opensas
Generating OpenShift Express ssh key to /home/sas/.ssh/libra_id_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/sas/.ssh/libra_id_rsa.
Your public key has been saved in /home/sas/.ssh/libra_id_rsa.pub.
The key fingerprint is:
be:40:6e:da:ad:53:5b:90:b3:0b:e8:75:7b:40:57:f1 sas@ubuntu
The key's randomart image is:
+--[ RSA 2048]----+
| .. |
| .. |
| . . E |
| = . |
| ...S= |
| .oo.= . |
| . .++.* |
| .+.o+.. |
| . ooo. |
+-----------------+
Problem reported from server. Response code was 400.
Re-run with -d for more information.

RESULT:
A namespace with name 'opensas' already exists

[opensas]

sas@ubuntu:~/devel/apps/experiment$ rhc-create-domain -l sscarano@gmail.com -p redsas -n open-sas
namespace contains non-alphanumeric characters!