Change name of ObjectMapperConfigurer to prevent conflict with graphq…

…l-java-tools fix graphql-java-kickstart#234

Fix release plugin configuration

[Gradle Release Plugin] - creating tag: 'v8.0.0'.

[Gradle Release Plugin] - creating tag: 'v7.5.0'.

[Gradle Release Plugin] - creating tag: 'v7.4.1'.

[Gradle Release Plugin] - creating tag: 'v7.4.0'.

[Gradle Release Plugin] - creating tag: 'v7.3.3'.

[Gradle Release Plugin] - creating tag: 'v7.3.2'.

[Gradle Release Plugin] - creating tag: 'v7.3.1'.

[Gradle Release Plugin] - creating tag: 'v7.3.0'.