[etc] Gradle jar task custom

Full jar 빌드할때

jar {
    manifest {
        attributes 'Main-Class': 'skycom.bss.koreanair.zoom.main.ApplicationMain'
    }
    enabled=true
    archiveClassifier = ''
    from { configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
    duplicatesStrategy = DuplicatesStrategy.WARN
}