Add Leaf JUnit test suite

leaf-server/build.gradle.kts.patch

@@ -234,7 +234,7 @@
  
      doFirst {
          workingDir.mkdirs()
-@@ -391,3 +_,62 @@
+@@ -391,3 +_,78 @@
          }
      }
  }
@@ -297,3 +297,19 @@
 +    }
 +}
 +// Gale end - branding changes - package license into jar
++
++// Leaf start - Leaf JUnit test suite
++tasks.register<Test>("runLeafTests") {
++    group = LifecycleBasePlugin.VERIFICATION_GROUP
++    include("**/LeafTestSuite.class")
++    workingDir = temporaryDir
++    useJUnitPlatform {
++        forkEvery = 1
++    }
++
++    // Configure mockito agent that is needed in newer java versions
++    val provider = objects.newInstance<MockitoAgentProvider>()
++    provider.fileCollection.from(mockitoAgent)
++    jvmArgumentProviders.add(provider)
++}
++// Leaf end - Leaf JUnit test suite