IdentifiedUser: Allow remote peer to throw during materialize

The @RemotePeer provider is allowed to throw an exception to indicate
that the remote peer is not defined in this scope.

Propagate that exception in the materialized provider.  Otherwise
ReceiveCommits fails in such contexts.

Change-Id: Ie7a87362aec5f6ebe014434809159d1a68878695

gerrit-server/src/main/java/com/google/gerrit/server/IdentifiedUser.java

@@ -425,7 +425,18 @@ public class IdentifiedUser extends CurrentUser {
    * @return copy of the identified user
    */
   public IdentifiedUser materializedCopy() {
-    final CapabilityControl capabilities = getCapabilities();
+    CapabilityControl capabilities = getCapabilities();
+    Provider<SocketAddress> remotePeer;
+    try {
+      remotePeer = Providers.of(remotePeerProvider.get());
+    } catch (OutOfScopeException | ProvisionException e) {
+      remotePeer = new Provider<SocketAddress>() {
+        @Override
+        public SocketAddress get() {
+          throw e;
+        }
+      };
+    }
     return new IdentifiedUser(new CapabilityControl.Factory() {
 
       @Override
@@ -434,8 +445,7 @@ public class IdentifiedUser extends CurrentUser {
       }
     }, authConfig, realm, anonymousCowardName,
         Providers.of(canonicalUrl.get()), accountCache, groupBackend,
-        disableReverseDnsLookup, Providers.of(remotePeerProvider.get()), state,
-        realUser);
+        disableReverseDnsLookup, remotePeer, state, realUser);
   }
 
   private String guessHost() {