Update Gerrit-API version to 2.9-SNAPSHOT

Change-Id: Id2d4bebcfa6c121d608029a931ec4682611d431c
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index 3afd20e..fbdf80e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <Gerrit-ApiType>PLUGIN</Gerrit-ApiType>
-    <Gerrit-ApiVersion>2.8-SNAPSHOT</Gerrit-ApiVersion>
+    <Gerrit-ApiVersion>2.9-SNAPSHOT</Gerrit-ApiVersion>
   </properties>
 
   <build>
@@ -58,7 +58,7 @@
   <repositories>
     <repository>
       <id>gerrit-api-repository</id>
-      <url>https://gerrit-api.commondatastorage.googleapis.com/snapshot/</url>
+      <url>https://gerrit-api.storage.googleapis.com/snapshot/</url>
     </repository>
   </repositories>
 </project>

src/main/java/com/googlesource/gerrit/plugins/avatars/external/ExternalUrlAvatarProvider.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/avatars/external/ExternalUrlAvatarProvider.java b/src/main/java/com/googlesource/gerrit/plugins/avatars/external/ExternalUrlAvatarProvider.java
index 15a4be6..902f8d6 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/avatars/external/ExternalUrlAvatarProvider.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/avatars/external/ExternalUrlAvatarProvider.java
@@ -14,6 +14,7 @@
 
 package com.googlesource.gerrit.plugins.avatars.external;
 
+import com.google.gerrit.common.Nullable;
 import com.google.gerrit.extensions.annotations.Listen;
 import com.google.gerrit.reviewdb.client.AccountExternalId;
 import com.google.gerrit.reviewdb.client.AccountExternalId.Key;
@@ -33,8 +34,6 @@
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
-import javax.annotation.Nullable;
-
 @Listen
 @Singleton
 public class ExternalUrlAvatarProvider implements AvatarProvider {