Specs: extract add_kasmvnc_user_docker()

spec/vncserver_spec.py

@@ -15,10 +15,14 @@ def run_cmd(cmd, **kwargs):
     return completed_process
 
 
+def add_kasmvnc_user_docker():
+    completed_process = run_cmd('echo -e "password\\npassword\\n" | vncpasswd -u docker')
+    expect(completed_process.returncode).to(equal(0))
+
+
 with description('vncserver') as self:
     with it('selects passed DE with -s'):
-        completed_process = run_cmd('echo -e "password\\npassword\\n" | vncpasswd -u docker')
-        expect(completed_process.returncode).to(equal(0))
+        add_kasmvnc_user_docker()
 
         cmd = 'vncserver :1 -select-de mate -cert /etc/ssl/certs/ssl-cert-snakeoil.pem -key /etc/ssl/private/ssl-cert-snakeoil.key -sslOnly -FrameRate=24 -interface 0.0.0.0 -httpd /usr/share/kasmvnc/www -depth 24 -geometry 1280x1050'
         try:
@@ -31,8 +35,7 @@ with description('vncserver') as self:
             run_cmd('vncserver -kill :1')
 
     with it('asks to select a DE, when ran with -select-de'):
-        completed_process = run_cmd('echo -e "password\\npassword\\n" | vncpasswd -u docker')
-        expect(completed_process.returncode).to(equal(0))
+        add_kasmvnc_user_docker()
 
         cmd = 'vncserver :1 -select-de -cert /etc/ssl/certs/ssl-cert-snakeoil.pem -key /etc/ssl/private/ssl-cert-snakeoil.key -sslOnly -FrameRate=24 -interface 0.0.0.0 -httpd /usr/share/kasmvnc/www -depth 24 -geometry 1280x1050'
         try: