Update http2 and grpc vendored packages (#2456)

To ensure we incorporate fixes for [CVE-2019-9512](https://nvd.nist.gov/vuln/detail/CVE-2019-9512) (Ping Flood), [CVE-2019-9514](https://nvd.nist.gov/vuln/detail/CVE-2019-9514) (Reset Flood), and [CVE-2019-9515](https://nvd.nist.gov/vuln/detail/CVE-2019-9515) (Settings Flood), described [here](https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md).

1) `golang.org/x/net/http2` changes are [here](golang/net@74dc4d7).

2) `google.golang.org/grpc` was updated to the latest tag that incorporates the fixes: [v1.23.0](https://github.com/grpc/grpc-go/releases/tag/v1.23.0).

certs/manager.go

@@ -18,8 +18,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	cache "github.com/pmylund/go-cache"
+	"github.com/sirupsen/logrus"
 )
 
 // StorageHandler is a standard interface to a storage backend,

dnscache/storage.go

@@ -6,8 +6,8 @@ import (
 
 	"fmt"
 
-	"github.com/sirupsen/logrus"
 	cache "github.com/pmylund/go-cache"
+	"github.com/sirupsen/logrus"
 )
 
 // DnsCacheItem represents single record in cache

gateway/api.go

@@ -41,9 +41,9 @@ import (
 	"sync"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	"github.com/gorilla/mux"
 	uuid "github.com/satori/go.uuid"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/crypto/bcrypt"
 
 	"github.com/TykTechnologies/tyk/apidef"

gateway/api_definition.go

@@ -22,8 +22,8 @@ import (
 	"github.com/TykTechnologies/tyk/headers"
 	"github.com/TykTechnologies/tyk/rpc"
 
-	"github.com/sirupsen/logrus"
 	circuit "github.com/rubyist/circuitbreaker"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/gojsonschema"
 	"github.com/TykTechnologies/tyk/apidef"

gateway/api_loader.go

@@ -11,9 +11,9 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/sirupsen/logrus"
 	"github.com/gorilla/mux"
 	"github.com/justinas/alice"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/apidef"
 	"github.com/TykTechnologies/tyk/config"

gateway/coprocess_id_extractor.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	"github.com/mitchellh/mapstructure"
+	"github.com/sirupsen/logrus"
 	xmlpath "gopkg.in/xmlpath.v2"
 
 	"github.com/TykTechnologies/tyk/apidef"

gateway/event_system.go

@@ -7,8 +7,8 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	circuit "github.com/rubyist/circuitbreaker"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/apidef"
 	"github.com/TykTechnologies/tyk/config"

gateway/host_checker_manager.go

@@ -9,8 +9,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	uuid "github.com/satori/go.uuid"
+	"github.com/sirupsen/logrus"
 	msgpack "gopkg.in/vmihailenco/msgpack.v2"
 
 	"github.com/TykTechnologies/tyk/apidef"

gateway/middleware.go

@@ -9,12 +9,12 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	"github.com/gocraft/health"
 	"github.com/justinas/alice"
 	newrelic "github.com/newrelic/go-agent"
 	"github.com/paulbellamy/ratecounter"
 	cache "github.com/pmylund/go-cache"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/apidef"
 	"github.com/TykTechnologies/tyk/config"

gateway/mw_basic_auth.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	cache "github.com/pmylund/go-cache"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/crypto/bcrypt"
 	"golang.org/x/sync/singleflight"
 

gateway/mw_openid.go

@@ -8,8 +8,8 @@ import (
 	"net/http"
 	"sync"
 
-	"github.com/sirupsen/logrus"
 	jwt "github.com/dgrijalva/jwt-go"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/openid2go/openid"
 	"github.com/TykTechnologies/tyk/apidef"

gateway/newrelic.go

@@ -4,11 +4,11 @@ import (
 	"fmt"
 	"strconv"
 
-	"github.com/sirupsen/logrus"
 	"github.com/gocraft/health"
 	"github.com/gorilla/mux"
 	newrelic "github.com/newrelic/go-agent"
 	"github.com/newrelic/go-agent/_integrations/nrgorilla/v1"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/config"
 )

gateway/res_handler_transform.go

@@ -10,8 +10,8 @@ import (
 	"net/http"
 	"strconv"
 
-	"github.com/sirupsen/logrus"
 	"github.com/clbanning/mxj"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/apidef"
 	"github.com/TykTechnologies/tyk/headers"

gateway/tracing.go

@@ -8,8 +8,8 @@ import (
 	"net/http/httputil"
 	"strings"
 
-	"github.com/sirupsen/logrus"
 	"github.com/gorilla/mux"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/tyk/apidef"
 )

storage/redis_cluster.go

@@ -7,9 +7,9 @@ import (
 	"sync"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	"github.com/garyburd/redigo/redis"
 	uuid "github.com/satori/go.uuid"
+	"github.com/sirupsen/logrus"
 
 	"github.com/TykTechnologies/redigocluster/rediscluster"
 	"github.com/TykTechnologies/tyk/config"