Do not setup Wowza if no license is set.

2.Common_services/4.Wowza/0_setup.py

@@ -7,6 +7,10 @@ import utils
 
 def setup(interactive=True):
     dir_path = utils.get_dir(__file__)
+    license = utils.get_conf('WOWZA_LICENSE')
+    if not license:
+        utils.log('No Wowza license set, skipping Wowza installation.')
+        return
     wowza_setup_name = 'WowzaStreamingEngine-4.5.0-linux-x64-installer.deb'
     utils.log('It may take a while to download the Wowza installer from the UbiCast server.')
     if utils.check_cmd('lsb_release -a | grep 14') == 0:
@@ -19,7 +23,7 @@ def setup(interactive=True):
         '[ -f "/tmp/%(name)s" ] || wget -q "https://www.ubicast.eu/media/downloads/packages/%(name)s" -O "/tmp/%(name)s"' % {'name': wowza_setup_name},
         'dpkg -i "/tmp/%s"' % wowza_setup_name,
         # Configure Wowza
-        'echo "%s" > /usr/local/WowzaStreamingEngine/conf/Server.license' % utils.get_conf('WOWZA_LICENSE'),
+        'echo "%s" > /usr/local/WowzaStreamingEngine/conf/Server.license' % license,
         'echo "ubicast %s admin" > /usr/local/WowzaStreamingEngine/conf/admin.password' % utils.get_conf('WOWZA_MANAGER_PWD'),
         'update-rc.d WowzaStreamingEngine defaults',
         'update-rc.d WowzaStreamingEngineManager defaults',