update realm lib to avoid realmIOException to many open files

app/build.gradle

@@ -7,7 +7,7 @@ buildscript {
 
     dependencies {
         classpath 'io.fabric.tools:gradle:1.21.6'
-        classpath 'io.realm:realm-gradle-plugin:1.1.0'
+        classpath 'io.realm:realm-gradle-plugin:1.1.1'
         classpath 'org.ajoberstar:grgit:1.5.0'
     }
 }