add mysql config.

appveyor.yml

@@ -4,8 +4,10 @@ environment:
   BUILDING_ON_PLATFORM: win
   BuildEnvironment: appveyor
   Cap_SqlServer_ConnectionStringTemplate: Server=(local)\SQL2014;Database={0};User ID=sa;Password=Password12!
+  Cap_MySql_ConnectionStringTemplate: Server=localhost;Database={0};Uid=root;Pwd=Password12!
 services:
   - mssql2014
+  - mysql
 build_script:
 - ps: ./ConfigureMSDTC.ps1
 - ps: ./build.ps1