Fixed bug in get_distribution_and_version

* Added exception handling for the case where the lsb_release command doesn't return expected value

Change-Id: Id01ed6588f55b2c7c4ca8dfd6050217a9be882d4

cloudcafe/compute/common/clients/remote_instance/linux/linux_client.py

@@ -578,5 +578,8 @@ class LinuxClient(RemoteInstanceClient):
 
         result = self.ssh_client.execute_command('lsb_release -d')
         if result:
-            distro = result.stdout.split(':')[1]
-            return distro
+            try:
+                distro = result.stdout.split(':')[1]
+                return distro
+            except IndexError:
+                return ''