Add clientUpdateByPrimaryKeyMethodGenerated method

[octoape]

The motivation for adding this method can be found in #1116

[jeffgbutler]

1. Please make the corresponding change in the Kotlin generator disregard, the Kotlin method is already named correctly
2. You also need to implement new plugin methods in https://github.com/mybatis/generator/blob/master/core/mybatis-generator-core/src/main/java/org/mybatis/generator/api/CompositePlugin.java

[octoape]

OK, the code has been changed.

[coveralls]

coverage: 88.329% (-0.002%) from 88.331%
when pulling b216a8e on octoape:master
into afe6f8d on mybatis:master.

[jeffgbutler]

Thanks for your contribution!