VOL-1643 Unsuitable attribute names are renamed for gRPC Java support

- proto files are modified to support compilation of generated Java code
- schema.proto and yang_options.proto files are deleted since there is no need for netconf in Voltha.
Change-Id: I6d8796d74a284529e5bc5926762e77ceaa31638b
diff --git a/protos/voltha_protos/adapter.proto b/protos/voltha_protos/adapter.proto
index 8c2a0cc..f5b2aa6 100644
--- a/protos/voltha_protos/adapter.proto
+++ b/protos/voltha_protos/adapter.proto
@@ -1,6 +1,8 @@
 syntax = "proto3";
 
-option go_package = "github.com/opencord/voltha-protos/v2/go/voltha";
+option go_package = "github.com/opencord/voltha-protos/v3/go/voltha";
+option java_package = "org.opencord.voltha";
+option java_outer_classname = "VolthaAdapter";
 
 package voltha;
 
@@ -12,7 +14,8 @@
 message AdapterConfig {
 
     // Common adapter config attributes here
-    common.LogLevel.LogLevel log_level = 1;
+    common.LogLevel.Types log_level = 1;
+
 
     // Custom (vendor-specific) configuration attributes
     google.protobuf.Any additional_config = 64;