Add some missing attributes for members

.gitignore

@@ -25,3 +25,4 @@ config/deb/control.bak
 config/rpm/percona-toolkit.spec.bak
 config/sphinx-build/percona-theme/*
 coverage.out
+.idea

src/go/mongolib/proto/replstatus.go

@@ -36,7 +36,11 @@ type Members struct {
 	Self                 bool                `bson:"self"`                 // true if this is the server we are currently connected
 	State                float64             `bson:"state"`                // integer between 0 and 10 that represents the replica state of the member.
 	ElectionTime         primitive.Timestamp `bson:"electionTime"`         // For the current primary, information regarding the election Timestamp from the operation log.
-	ElectionDate  primitive.DateTime  `bson:"electionDate"`  // For the current primary, an ISODate formatted date string that reflects the election date
+	ElectionDate         primitive.DateTime  `bson:"electionDate"`         // For the current primary, an ISODate formatted date string that reflects the election date.
+	LastHeartbeat        primitive.DateTime  `bson:"lastHeartbeat"`        // Reflects the last time the server that processed the replSetGetStatus command received a response from a heartbeat that it sent to this member.
+	LastHeartbeatRecv    primitive.DateTime  `bson:"lastHeartbeatRecv"`    // Reflects the last time the server that processed the replSetGetStatus command received a heartbeat request from this member.
+	LastHeartbeatMessage string              `bson:"lastHeartbeatMessage"` // Contains a string representation of that message.
+	PingMs               *float64            `bson:"pingMs,omitempty"`     // Represents the number of milliseconds (ms) that a round-trip packet takes to travel between the remote member and the local instance.
 	Set                  string              `bson:"-"`
 	StorageEngine        StorageEngine
 }