Only include --runas arg if we have a value

tailbone/views/importing.py

@@ -467,8 +467,6 @@ And here is the output:
                 '--config={}/app/quiet.conf'.format(sys.prefix),
                 '--progress',
                 '--progress-socket=127.0.0.1:{}'.format(port),
-                '--runas={}'.format(runas),
-                subcommand,
             ]
         else:
             cmd = [
@@ -476,10 +474,16 @@ And here is the output:
                 'bin/{}'.format(command),
                 '-c', 'app/quiet.conf',
                 '-P',
-                '--runas', runas,
-                subcommand,
             ]
 
+        if runas:
+            if typ == 'true':
+                cmd.apend('--runas={}'.format(runas))
+            else:
+                cmd.extend(['--runas', runas])
+
+        cmd.append(subcommand)
+
         cmd.extend(data['models'])
 
         if data['create']: