[error prone] suppress NonAtomicVolatileUpdate warning in SimpleLruCache

It's not important to update time field, scalability is more important
than perfect LRU ordering of cache entries.

Change-Id: I22466c580cd3613b81e1989130b2724af9d6c466
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/util/SimpleLruCache.java

@@ -159,6 +159,7 @@ public class SimpleLruCache<K, V> {
 	 *
 	 * @return value mapped for this key, or {@code null} if no value is mapped
 	 */
+	@SuppressWarnings("NonAtomicVolatileUpdate")
 	public V get(Object key) {
 		Entry<K, V> entry = map.get(key);
 		if (entry != null) {
@@ -185,6 +186,7 @@ public class SimpleLruCache<K, V> {
 	 * @throws NullPointerException
 	 *             if the specified key or value is null
 	 */
+	@SuppressWarnings("NonAtomicVolatileUpdate")
 	public V put(@NonNull K key, @NonNull V value) {
 		map.put(key, new Entry<>(key, value, ++time));
 		if (map.size() > maximumSize) {