Adapt init to Gerrit 2.14 readEnum() interface

In Gerrit 2.14 the readEnum() needs the full list of allowed values
and does not rely anymore on reflection.

Change-Id: I9a0aaca831a3de78cce10510c03f44851b834695

src/main/java/com/googlesource/gerrit/plugins/its/base/its/InitIts.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/its/base/its/InitIts.java b/src/main/java/com/googlesource/gerrit/plugins/its/base/its/InitIts.java
index 1867a10..ac0136c 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/its/base/its/InitIts.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/its/base/its/InitIts.java
@@ -26,6 +26,7 @@
 import org.eclipse.jgit.lib.Config;
 
 import java.io.IOException;
+import java.util.EnumSet;
 
 public class InitIts implements InitStep {
 
@@ -76,6 +77,7 @@
     }
     itsintegration =
         ui.readEnum(itsintegration,
+            EnumSet.allOf(ItsIntegration.class),
             "Issue tracker integration for all projects?");
     switch (itsintegration) {
       case ENFORCED: