rebase: upgrade snapshot v1beta1 api and clientset to v1 version

At present e2e snapshot code make use of snapshot v1beta1 api and client
This patch address the same and snapshot api clientset/apis are updated
to v1 version.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/google.golang.org/grpc/vet.sh

@@ -28,8 +28,7 @@ cleanup() {
 }
 trap cleanup EXIT
 
-PATH="${HOME}/go/bin:${GOROOT}/bin:${PATH}"
-go version
+PATH="${GOPATH}/bin:${GOROOT}/bin:${PATH}"
 
 if [[ "$1" = "-install" ]]; then
   # Check for module support
@@ -105,6 +104,12 @@ git grep '"github.com/envoyproxy/go-control-plane/envoy' -- '*.go' ':(exclude)*.
 # TODO: Remove when we drop Go 1.10 support
 go list -f {{.Dir}} ./... | xargs go run test/go_vet/vet.go
 
+# - gofmt, goimports, golint (with exceptions for generated code), go vet.
+gofmt -s -d -l . 2>&1 | fail_on_output
+goimports -l . 2>&1 | not grep -vE "\.pb\.go"
+golint ./... 2>&1 | not grep -vE "\.pb\.go:"
+go vet -all ./...
+
 misspell -error .
 
 # - Check that generated proto files are up to date.
@@ -114,22 +119,12 @@ if [[ -z "${VET_SKIP_PROTO}" ]]; then
     (git status; git --no-pager diff; exit 1)
 fi
 
-# - gofmt, goimports, golint (with exceptions for generated code), go vet,
-# go mod tidy.
-# Perform these checks on each module inside gRPC.
-for MOD_FILE in $(find . -name 'go.mod'); do
-  MOD_DIR=$(dirname ${MOD_FILE})
-  pushd ${MOD_DIR}
-  go vet -all ./... | fail_on_output
-  gofmt -s -d -l . 2>&1 | fail_on_output
-  goimports -l . 2>&1 | not grep -vE "\.pb\.go"
-  golint ./... 2>&1 | not grep -vE "/testv3\.pb\.go:"
-
-  go mod tidy
+# - Check that our modules are tidy.
+if go help mod >& /dev/null; then
+  find . -name 'go.mod' | xargs -IXXX bash -c 'cd $(dirname XXX); go mod tidy'
   git status --porcelain 2>&1 | fail_on_output || \
     (git status; git --no-pager diff; exit 1)
-  popd
-done
+fi
 
 # - Collection of static analysis checks
 #
@@ -146,11 +141,8 @@ not grep -Fv '.CredsBundle
 .NewAddress
 .NewServiceConfig
 .Type is deprecated: use Attributes
-BuildVersion is deprecated
 balancer.ErrTransientFailure
 balancer.Picker
-extDesc.Filename is deprecated
-github.com/golang/protobuf/jsonpb is deprecated
 grpc.CallCustomCodec
 grpc.Code
 grpc.Compressor
@@ -172,7 +164,13 @@ grpc.WithServiceConfig
 grpc.WithTimeout
 http.CloseNotifier
 info.SecurityVersion
+resolver.Backend
+resolver.GRPCLB
+extDesc.Filename is deprecated
+BuildVersion is deprecated
+github.com/golang/protobuf/jsonpb is deprecated
 proto is deprecated
+xxx_messageInfo_
 proto.InternalMessageInfo is deprecated
 proto.EnumName is deprecated
 proto.ErrInternalBadWireType is deprecated
@@ -186,12 +184,7 @@ proto.RegisterExtension is deprecated
 proto.RegisteredExtension is deprecated
 proto.RegisteredExtensions is deprecated
 proto.RegisterMapType is deprecated
-proto.Unmarshaler is deprecated
-resolver.Backend
-resolver.GRPCLB
-Target is deprecated: Use the Target field in the BuildOptions instead.
-xxx_messageInfo_
-' "${SC_OUT}"
+proto.Unmarshaler is deprecated' "${SC_OUT}"
 
 # - special golint on package comments.
 lint_package_comment_per_package() {