Renamed datagrid and datastore packages

net.onrc.onos.datagrid.* => net.onrc.onos.core.datagrid.*
net.onrc.onos.datastore.* => net.onrc.onos.core.datastore.*

Change-Id: Ibe1894a6fabae08ea7cfcbf6595f0c91b05ef497
diff --git a/src/main/protobuf/ramcloud.proto b/src/main/protobuf/ramcloud.proto
index 68a7263..35c63d8 100644
--- a/src/main/protobuf/ramcloud.proto
+++ b/src/main/protobuf/ramcloud.proto
@@ -1,6 +1,6 @@
 package RCProtos;
 
-option java_package = "net.onrc.onos.datastore";
+option java_package = "net.onrc.onos.core.datastore";
 option java_outer_classname = "RCProtos";
 
 message SwitchProperty {