fixed testcase
improve dynamic config
improve dynamic config
improve WallFilter
sql parser support alter table drop constraint
bug fixed for wallfilter
dynamic config jmx support
0.2.20
0.2.20
Merge pull request #347 from wenshao/master

0.2.20
improve OracleExceptionSorter
add testcase
OracleExpceptionSorter add fatal error code 17442
improve dynamic config support for DruidDataSourceStatLogger
0.2.21
improve dynamic config support for ValidConnectionChecker
0.2.21-SNAPSHOT
Merge remote-tracking branch 'origin/master'
fixed testcase
validConnectionChecker support dynamic config