Increase default value of receive.timeout

Double the value of receive.timeout in order to enable default Gerrit
configuration receive huge repositories like lge/hammerhead-kernel [1]
from Android code base.

[1] https://android.googlesource.com/device/lge/hammerhead-kernel/

Change-Id: I30db27c36f03aacea3fd08137dfe4f04020d05de
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>

Documentation/config-gerrit.txt

@@ -3031,7 +3031,7 @@ and updating references, not the time to index the pack. Values can
 be specified using standard time unit abbreviations ('ms', 'sec',
 'min', etc.).
 +
-Default is 2 minutes. If no unit is specified, milliseconds
+Default is 4 minutes. If no unit is specified, milliseconds
 is assumed.
 
 [[receive.trustedKey]]receive.trustedKey::

gerrit-server/src/main/java/com/google/gerrit/server/git/AsyncReceiveCommits.java

@@ -72,7 +72,7 @@ public class AsyncReceiveCommits implements PreReceiveHook {
     long getTimeoutMillis(@GerritServerConfig final Config cfg) {
       return ConfigUtil.getTimeUnit(
           cfg, "receive", null, "timeout",
-          TimeUnit.MINUTES.toMillis(2),
+          TimeUnit.MINUTES.toMillis(4),
           TimeUnit.MILLISECONDS);
     }
   }