Fix incorrect Groovy code in Gradle release tasks

"No such property: shouldCreateTag for class: org.hibernate.build.ReleaseDetails"

Author: yrodiere

release/release.gradle

@@ -153,7 +153,7 @@ def gitPostStepsTask = tasks.register( 'gitPostSteps' ) {
         def releaseVersion = releaseDetails.releaseVersion
         def developmentVersion = releaseDetails.developmentVersion
 
-        if ( releaseDetails.shouldCreateTag ) {
+        if ( releaseDetails.shouldCreateTag() ) {
             logger.lifecycle( "Tagging release : `${releaseDetails.tagNameToUse}`..." )
             executeGitCommand( 'tag', '-a', releaseDetails.tagNameToUse, '-m', "Release $releaseVersion.fullName" )
         }
@@ -410,7 +410,7 @@ tasks.register( 'releasePerform' ) {
     dependsOn uploadDocumentationDescriptor
 
     doLast {
-        if ( ormBuildDetails.releaseDetails.shouldCreateTag ) {
+        if ( ormBuildDetails.releaseDetails.shouldCreateTag() ) {
             logger.lifecycle( "Pushing branch and tag to remote `${project.gitRemote}`..." )
             executeGitCommand( 'push', '--atomic', project.gitRemote, project.gitBranch, project.releaseTag )
         }