Gardening - improve test QueryCollectionsIndexManagerIntegrationTest

Seeing occasional 15s on CI as the index has not
finished building.  15s is on the short side so
giving the server a little longer.

Change-Id: I7b05232d00fe812222e4d3a3eff3dce23d96644f
Reviewed-on: https://review.couchbase.org/c/couchbase-jvm-clients/+/215043
Tested-by: Build Bot <build@couchbase.com>
Reviewed-by: David Nault <david.nault@couchbase.com>

java-client/src/integrationTest/java/com/couchbase/client/java/manager/query/QueryCollectionsIndexManagerIntegrationTest.java

@@ -72,7 +72,7 @@
 public class QueryCollectionsIndexManagerIntegrationTest extends JavaIntegrationTest {
 
   // time to allow for watch operations that are expected to succeed eventually
-  private static final Duration watchTimeout = Duration.ofSeconds(15);
+  private static final Duration watchTimeout = Duration.ofSeconds(60);
   private static final String scopeName = UUID.randomUUID().toString();
   private static final String collectionName = UUID.randomUUID().toString();