health: Merges healthcheck package to health package. (#2417)

health/client.go

@@ -16,9 +16,7 @@
  *
  */
 
-// Package healthcheck enables support for grpc health checking.  It is
-// EXPERIMENTAL.
-package healthcheck
+package health
 
 import (
 	"fmt"

health/client_test.go

@@ -16,7 +16,7 @@
  *
  */
 
-package healthcheck
+package health
 
 import (
 	"errors"

health/server.go

@@ -18,8 +18,8 @@
 
 //go:generate ./regenerate.sh
 
-// Package health provides some utility functions to health-check a server. The implementation
-// is based on protobuf. Users need to write their own implementations if other IDLs are used.
+// Package health provides a service that exposes server's health and it must be
+// imported to enable support for client-side health checks.
 package health
 
 import (

health/server_test.go

@@ -15,6 +15,7 @@
  * limitations under the License.
  *
  */
+
 package health_test
 
 import (