Capsule hangs when try to lock app directory

[pditommaso]

On file system not supporting File lock primitive Capsule hangs trying to opening a lock. A better strategy to use a timeout and throw an error if the lock cannot be created.

"main" #1 prio=5 os_prio=0 tid=0x00007f134404a800 nid=0xb6d1 runnable [0x00007f134d5bb000]
   java.lang.Thread.State: RUNNABLE
	at sun.nio.ch.FileDispatcherImpl.lock0(Native Method)
	at sun.nio.ch.FileDispatcherImpl.lock(FileDispatcherImpl.java:94)
	at sun.nio.ch.FileChannelImpl.lock(FileChannelImpl.java:1078)
	at java.nio.channels.FileChannel.lock(FileChannel.java:1053)
	at Capsule.lockAppCache(Capsule.java:2167)
	at Capsule.isAppCacheUpToDate1(Capsule.java:2104)
	at Capsule.buildAppCacheDir0(Capsule.java:2070)
	at Capsule.buildAppCacheDir(Capsule.java:2056)
	at Capsule.getOrCreateAppDir(Capsule.java:2004)
	at Capsule.appDir(Capsule.java:2016)
	at Capsule.simpleResolve(Capsule.java:3501)
	at Capsule.resolve00(Capsule.java:3490)
	at Capsule.resolve0(Capsule.java:3402)
	at Capsule.resolve(Capsule.java:3375)
	at Capsule.resolve00(Capsule.java:3421)
	at Capsule.resolve0(Capsule.java:3402)
	at Capsule.resolve(Capsule.java:3375)
	at Capsule.resolve(Capsule.java:3389)
	at Capsule.buildJavaProcess(Capsule.java:2228)
	at Capsule.buildProcess0(Capsule.java:1530)
	at Capsule.buildProcess(Capsule.java:1521)
	at Capsule.prelaunch0(Capsule.java:1494)
	at Capsule.prelaunch(Capsule.java:1487)
	at CapsuleLoader.prelaunch(CapsuleLoader.java:41)
	at Capsule.prepareForLaunch(Capsule.java:1339)
	at Capsule.launch(Capsule.java:1268)
	at Capsule.main0(Capsule.java:399)
	at Capsule.main(Capsule.java:379)