Merge pull request #44 from wdw1206/master

primaryKey与partitionKey都存在时，insert路由错误。测试表<table name="travelrecord" aut...
druid1.0.12已发布，支持insert into...values(),()...的代码放开
Merge branch 'master' of https://github.com/wdw1206/Mycat-Server
fixed NullPointerException on execution select next value for MYCATSEQ_XXX