Change db host from cautotest to cautotest-mysql.

BUG=None
TEST=Checked cname resolves
diff --git a/global_config.ini b/global_config.ini
index 37fa226..a00d3bc 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -1,5 +1,5 @@
 [AUTOTEST_WEB]
-host: cautotest
+host: cautotest-mysql
 database: chromeos_autotest_db
 db_type: mysql
 user: chromeosqa-admin
@@ -9,7 +9,7 @@
 parse_failed_repair_default: 0
 # Only set this if your server is not 'http://[SERVER] hostname/afe/'
 #base_url: http://your_autotest_server/afe/
-readonly_host: cautotest
+readonly_host: cautotest-mysql
 readonly_user: chromeosqa-read
 readonly_password: qyBM6kDu
 query_timeout: 3600