CC-4104: airtime-uninstall should not purge airtime database be default

-small fix

install_minimal/airtime-install

@@ -151,6 +151,7 @@ if [ "$result" -eq "0" ]; then
 elif [ "$result" -eq "1" -a "$reinstall" = "f" ]; then
     echo " * Same version of Airtime already installed! Reusing database."
     nodb='t'
+    overwrite='f'
 elif [ "$result" -eq "2" ]; then
     echo " * Previous version of Airtime already installed..will perform upgrade."
     DO_UPGRADE="1"

python_apps/pypo/liquidsoap_scripts/generate_liquidsoap_cfg.py

@@ -19,7 +19,7 @@ def generate_liquidsoap_config(ss):
             val = d[u'value']
             val = val if len(val) > 0 else "0"
         str_buffer = "%s = %s\n" % (key, val)
-        fh.write(str_buffer)
+        fh.write(str_buffer.encode('utf-8'))
     fh.write('log_file = "/var/log/airtime/pypo-liquidsoap/<script>.log"\n')
     fh.close()