Add a system setting for Glacier's initial wait.

Glacier has an initial wait parameter, which is used to check on the
progress of a job. By default, it is set to 3 hours. This may work
well against existing AWS Glacier interface, however, against a
Glacier emulator the timeout should be overriden. The change allows
setting the timeout to an arbitrary shorter value with
-Dtest.glacier.initial-wait.

apis/glacier/src/main/java/org/jclouds/glacier/blobstore/strategy/internal/BasePollingStrategy.java

@@ -48,7 +48,8 @@ public class BasePollingStrategy implements PollingStrategy {
 
    @Inject
    public BasePollingStrategy(GlacierClient client) {
-      this(client, DEFAULT_INITIAL_WAIT, DEFAULT_TIME_BETWEEN_POLLS);
+      this(client, Long.parseLong(System.getProperty("test.glacier.initial-wait",
+              Long.toString(DEFAULT_INITIAL_WAIT))), DEFAULT_TIME_BETWEEN_POLLS);
    }
 
    private boolean inProgress(String job, String vault) {