Allow set waitTimeInSeconds

Author: westse

src/main/kotlin/org/springdoc/openapi/gradle/plugin/OpenApiGeneratorTask.kt

@@ -16,6 +16,7 @@ import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.provider.MapProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Internal
 import org.gradle.api.tasks.OutputDirectory
 import org.gradle.api.tasks.TaskAction
 import java.net.ConnectException
@@ -40,7 +41,8 @@ open class OpenApiGeneratorTask : DefaultTask() {
 
 	@get:OutputDirectory
 	val outputDir: DirectoryProperty = project.objects.directoryProperty()
-	private val waitTimeInSeconds: Property<Int> =
+	@get:Internal
+	val waitTimeInSeconds: Property<Int> =
 		project.objects.property(Int::class.java)
 
 	init {