Fix code style of config Dao

[duzhen1996]

No description provided.

[qiyuangong]

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project smart-metastore: Compilation failure: Compilation failure: 
[ERROR] /home/travis/build/Intel-bigdata/SSM/smart-metastore/src/main/java/org/smartdata/metastore/dao/GlobalConfigDao.java:[128,49] cannot find symbol
[ERROR]   symbol:   method getProperty_name()
[ERROR]   location: variable globalConfig of type org.smartdata.model.GlobalConfig
[ERROR] /home/travis/build/Intel-bigdata/SSM/smart-metastore/src/main/java/org/smartdata/metastore/dao/GlobalConfigDao.java:[129,50] cannot find symbol
[ERROR]   symbol:   method getProperty_value()
[ERROR]   location: variable globalConfig of type org.smartdata.model.GlobalConfig
[ERROR] /home/travis/build/Intel-bigdata/SSM/smart-metastore/src/main/java/org/smartdata/metastore/dao/GlobalConfigDao.java:[139,19] cannot find symbol
[ERROR]   symbol:   method setProperty_name(java.lang.String)
[ERROR]   location: variable globalConfig of type org.smartdata.model.GlobalConfig
[ERROR] /home/travis/build/Intel-bigdata/SSM/smart-metastore/src/main/java/org/smartdata/metastore/dao/GlobalConfigDao.java:[140,19] cannot find symbol
[ERROR]   symbol:   method setProperty_value(java.lang.String)
[ERROR]   location: variable globalConfig of type org.smartdata.model.GlobalConfig