Upgrade OkHttp for Android SNI / NPN fix

https://github.com/square/okhttp/pull/1137
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=82149209
diff --git a/pom.xml b/pom.xml
index eb82d4d..c013a23 100644
--- a/pom.xml
+++ b/pom.xml
@@ -137,7 +137,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <okhttp.version>2.1.0</okhttp.version>
+    <okhttp.version>2.2.0-SNAPSHOT</okhttp.version>
     <netty.version>5.0.0.Alpha2-SNAPSHOT</netty.version>
     <jetty.alpn.version>8.0.0.v20140317</jetty.alpn.version>
     <jetty.alpn.path>