Move bundle validator back to registry under validation package

Move bundle validator from api back to registry and under validation
package. The bundle validator is removed from api.

Signed-off-by: Vu Dinh <[email protected]>

Author: dinhxuanvu

go.mod

@@ -31,7 +31,7 @@ require (
 	github.com/opencontainers/image-spec v1.0.2-0.20190823105129-775207bd45b6
 	github.com/opencontainers/runc v1.0.0-rc9 // indirect
 	github.com/opencontainers/runtime-spec v0.1.2-0.20190618234442-a950415649c7 // indirect
-	github.com/operator-framework/api v0.1.1
+	github.com/operator-framework/api v0.3.4
 	github.com/otiai10/copy v1.0.2
 	github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2
 	github.com/pkg/errors v0.9.1
@@ -45,10 +45,10 @@ require (
 	google.golang.org/grpc v1.26.0
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.2.8
-	k8s.io/api v0.18.0
-	k8s.io/apiextensions-apiserver v0.18.0
-	k8s.io/apimachinery v0.18.0
-	k8s.io/client-go v0.18.0
+	k8s.io/api v0.18.2
+	k8s.io/apiextensions-apiserver v0.18.2
+	k8s.io/apimachinery v0.18.2
+	k8s.io/client-go v0.18.2
 	k8s.io/klog v1.0.0
 	k8s.io/kubectl v0.18.0
 )