Add an AccountsUpdate class to update accounts from a single class

As a first step AccountsUpdate is only responsible for creating new
accounts. Additional functionality to update accounts will be added
later.

This is another step towards migrating accounts from ReviewDb to NoteDb.
In the end all code that needs to update accounts should use
AccountsUpdate. AccountsUpdate can then take care to update the accounts
in ReviewDb and NoteDb.

Change-Id: I77e3a664e23bfa579da7da7c1e86823e7ad905eb
Signed-off-by: Edwin Kempin <ekempin@google.com>

gerrit-server/src/main/java/com/google/gerrit/server/account/CreateAccount.java

@@ -69,6 +69,7 @@ public class CreateAccount implements RestModifyView<TopLevelResource, AccountIn
   private final VersionedAuthorizedKeys.Accessor authorizedKeys;
   private final SshKeyCache sshKeyCache;
   private final AccountCache accountCache;
+  private final AccountsUpdate accountsUpdate;
   private final AccountIndexer indexer;
   private final AccountByEmailCache byEmailCache;
   private final AccountLoader.Factory infoLoader;
@@ -86,6 +87,7 @@ public class CreateAccount implements RestModifyView<TopLevelResource, AccountIn
       VersionedAuthorizedKeys.Accessor authorizedKeys,
       SshKeyCache sshKeyCache,
       AccountCache accountCache,
+      AccountsUpdate accountsUpdate,
       AccountIndexer indexer,
       AccountByEmailCache byEmailCache,
       AccountLoader.Factory infoLoader,
@@ -100,6 +102,7 @@ public class CreateAccount implements RestModifyView<TopLevelResource, AccountIn
     this.authorizedKeys = authorizedKeys;
     this.sshKeyCache = sshKeyCache;
     this.accountCache = accountCache;
+    this.accountsUpdate = accountsUpdate;
     this.indexer = indexer;
     this.byEmailCache = byEmailCache;
     this.infoLoader = infoLoader;
@@ -172,7 +175,7 @@ public class CreateAccount implements RestModifyView<TopLevelResource, AccountIn
     Account a = new Account(id, TimeUtil.nowTs());
     a.setFullName(input.name);
     a.setPreferredEmail(input.email);
-    db.accounts().insert(Collections.singleton(a));
+    accountsUpdate.insert(db, a);
 
     for (AccountGroup.Id groupId : groups) {
       AccountGroupMember m = new AccountGroupMember(new AccountGroupMember.Key(id, groupId));