Generate inbound/outbound for HTTP/2 (#998)

* fix(kuma-cp) generate RDS for HTTP, HTTP/2 and gRPC

* fix(kuma-cp) generate inbound also for HTTP/2

* test(kuma-cp) fix xds/generator test

Signed-off-by: Nikolay Nikolaev <nikolay.nikolaev@konghq.com>

api/go.sum

@@ -1,15 +1,21 @@
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@@ -19,6 +25,7 @@ github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaW
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@@ -27,7 +34,9 @@ github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
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@@ -40,6 +49,7 @@ golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -51,24 +61,29 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
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