Adapt to change in gerrit core

Changing user1/2/3 to findowners1/2/3 because test ApiIT#accountTest
fails after gerrit change I2ed6ce74 changed AccountCreator to create the
default user in tests with name "user1".

Change-Id: I70c6d983253de965eb19822512d421f07a4e8af4
diff --git a/src/test/java/com/googlesource/gerrit/plugins/findowners/ApiIT.java b/src/test/java/com/googlesource/gerrit/plugins/findowners/ApiIT.java
index d6d039e..283faaf 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/findowners/ApiIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/findowners/ApiIT.java
@@ -144,7 +144,7 @@
 
   @Test
   public void accountTest() throws Exception {
-    String[] users = {"user1", "user2", "user3"};
+    String[] users = {"findowners1", "findowners2", "findowners3"};
     String[] emails1 = {"abc@g.com", "abc+xyz@g.com", "xyz-team+review@g.com"};
     String[] emails2 = {"abc@goog.com", "abc+xyz2@g.com", "xyz-team@goog.com"};
     // Create accounts with given user name, first and second email addresses.