Rename getCurrentUser to getUser

It is never ambiguous to say "User" instead of "CurrentUser". Save
some typing.

Change-Id: I03a051f1fd3758ba63749cded20a7c135b6cf58a

gerrit-server/src/main/java/com/google/gerrit/server/project/ListBranches.java

@@ -185,7 +185,7 @@ public class ListBranches implements RestReadView<ProjectResource> {
     for (UiAction.Description d : UiActions.from(
         branchViews,
         new BranchResource(refControl.getProjectControl(), info),
-        Providers.of(refControl.getCurrentUser()))) {
+        Providers.of(refControl.getUser()))) {
       if (info.actions == null) {
         info.actions = new TreeMap<>();
       }