MB-31956 Update protobuf index definition to be collection aware

The scope name, scope ID, collection name and collection ID are
added to index definition. The scope ID and collection ID are
encoded as hexadecimal strings

Change-Id: Ieab630de48f6fdc27b71d28109be9889b58ba8c0

secondary/protobuf/projector/index.proto

@@ -56,7 +56,7 @@ enum  PartitionScheme {
     RANGE = 5;
 }
 
-// Type of Hash scheme for partitioned index 
+// Type of Hash scheme for partitioned index
 enum  HashScheme {
     CRC32 = 0;
 }
@@ -87,5 +87,11 @@ message IndexDefn {
     optional string          whereExpression = 10; // where predicate
     repeated string          partnExpressions  = 11; // use expressions to evaluate doc
     optional bool            retainDeletedXATTR = 12; // index XATTRs of deleted docs
-    optional HashScheme      hashScheme = 13; // hash scheme for partitioned index 
+    optional HashScheme      hashScheme = 13; // hash scheme for partitioned index
+
+    // Collection specific
+    optional string          scope        = 14; // Name of the scope on which index is defined
+    optional string          scopeID      = 15; // ID  of the scope (base-16 string) on which index is defined
+    optional string          collection   = 16; // Name of the collection on which index is defined
+    optional string          collectionID = 17; // ID  of the collection (base-16 string) on which index is defined
 }

secondary/protobuf/projector/projector.go

@@ -840,3 +840,45 @@ func (instance *Instance) GetBucket() (bucket string) {
 	}
 	return
 }
+
+// GetScope will get the name of the scope in which instance is defined
+func (instance *Instance) GetScope() (scope string) {
+	if val := instance.GetIndexInstance(); val != nil {
+		return val.GetDefinition().GetScope()
+	} else {
+		// TODO: should we panic
+	}
+	return
+}
+
+// GetScopeID will get the ID of the scope (base-16 string) in which
+// instance is defined
+func (instance *Instance) GetScopeID() (scopeID string) {
+	if val := instance.GetIndexInstance(); val != nil {
+		return val.GetDefinition().GetScopeID()
+	} else {
+		// TODO: should we panic
+	}
+	return
+}
+
+// GetCollection will get the name of the collection in which instance is defined
+func (instance *Instance) GetCollection() (collection string) {
+	if val := instance.GetIndexInstance(); val != nil {
+		return val.GetDefinition().GetCollection()
+	} else {
+		// TODO: should we panic
+	}
+	return
+}
+
+// GetCollectionID will get the ID of the collection (base-16 string) in which
+// instance is defined
+func (instance *Instance) GetCollectionID() (collectionID string) {
+	if val := instance.GetIndexInstance(); val != nil {
+		return val.GetDefinition().GetCollectionID()
+	} else {
+		// TODO: should we panic
+	}
+	return
+}