批量insert计算路由时，字符串的值多了单引号
Merge pull request #61 from wdw1206/master

批量insert计算路由时，字符串的值多了单引号
1.4-dev-begin
Merge branch 'master' of https://github.com/MyCATApache/Mycat-Server
fixed:java.lang.NullPointerException at org.opencloudb.parser.druid.DruidShardingParseInfo.addShardingExpr(DruidShardingParseInfo.java:54)
Merge pull request #62 from wdw1206/master

fixed:java.lang.NullPointerException at org.opencloudb.parser.druid.Drui...