MM-10702 Moving plugins to use hashicorp go-plugin. (#8978)

* Moving plugins to use hashicorp go-plugin.

* Tweaks from feedback.

Gopkg.lock

@@ -7,6 +7,15 @@
   revision = "2600fb119af974220d3916a5916d6e31176aac1b"
   version = "v1.0.1"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/alecthomas/template"
+  packages = [
+    ".",
+    "parse"
+  ]
+  revision = "a0175ee3bccc567396460bf5acd36800cb10c49c"
+
 [[projects]]
   branch = "master"
   name = "github.com/armon/go-metrics"
@@ -112,7 +121,13 @@
 
 [[projects]]
   name = "github.com/golang/protobuf"
-  packages = ["proto"]
+  packages = [
+    "proto",
+    "ptypes",
+    "ptypes/any",
+    "ptypes/duration",
+    "ptypes/timestamp"
+  ]
   revision = "b4deda0973fb4c70b50d226b1af49f3da59f5265"
   version = "v1.1.0"
 
@@ -158,6 +173,12 @@
   packages = ["."]
   revision = "7554cd9344cec97297fa6649b055a8c98c2a1e55"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/hashicorp/go-hclog"
+  packages = ["."]
+  revision = "69ff559dc25f3b435631604f573a5fa1efdb6433"
+
 [[projects]]
   branch = "master"
   name = "github.com/hashicorp/go-immutable-radix"
@@ -176,6 +197,12 @@
   packages = ["."]
   revision = "b7773ae218740a7be65057fc60b366a49b538a44"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/hashicorp/go-plugin"
+  packages = ["."]
+  revision = "e8d22c780116115ae5624720c9af0c97afe4f551"
+
 [[projects]]
   branch = "master"
   name = "github.com/hashicorp/go-sockaddr"
@@ -214,6 +241,12 @@
   packages = ["."]
   revision = "2288bf30e9c8d7b5f6549bf62e07120d72fd4b6c"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/hashicorp/yamux"
+  packages = ["."]
+  revision = "2658be15c5f05e76244154714161f17e3e77de2e"
+
 [[projects]]
   branch = "master"
   name = "github.com/icrowley/fake"
@@ -330,6 +363,12 @@
   packages = ["."]
   revision = "3864e76763d94a6df2f9960b16a20a33da9f9a66"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/mitchellh/go-testing-interface"
+  packages = ["."]
+  revision = "a61a99592b77c9ba629d254a693acffaeb4b7e28"
+
 [[projects]]
   branch = "master"
   name = "github.com/mitchellh/mapstructure"
@@ -347,6 +386,12 @@
   revision = "0dc1626d56435e9d605a29875701721c54bc9bbd"
   version = "v1.10.0"
 
+[[projects]]
+  name = "github.com/oklog/run"
+  packages = ["."]
+  revision = "4dadeb3030eda0273a12382bb2348ffc7c9d1a39"
+  version = "v1.0.0"
+
 [[projects]]
   branch = "master"
   name = "github.com/olekukonko/tablewriter"
@@ -581,15 +626,20 @@
   name = "golang.org/x/net"
   packages = [
     "bpf",
+    "context",
     "html",
     "html/atom",
     "html/charset",
     "http/httpguts",
+    "http2",
+    "http2/hpack",
     "idna",
     "internal/iana",
     "internal/socket",
+    "internal/timeseries",
     "ipv4",
-    "ipv6"
+    "ipv6",
+    "trace"
   ]
   revision = "afe8f62b1d6bbd81f31868121a50b06d8188e1f9"
 
@@ -642,6 +692,45 @@
   revision = "b1f26356af11148e710935ed1ac8a7f5702c7612"
   version = "v1.1.0"
 
+[[projects]]
+  branch = "master"
+  name = "google.golang.org/genproto"
+  packages = ["googleapis/rpc/status"]
+  revision = "4065a77fc542a455295382a23a996a08ed18813a"
+
+[[projects]]
+  name = "google.golang.org/grpc"
+  packages = [
+    ".",
+    "balancer",
+    "balancer/base",
+    "balancer/roundrobin",
+    "channelz",
+    "codes",
+    "connectivity",
+    "credentials",
+    "encoding",
+    "encoding/proto",
+    "grpclb/grpc_lb_v1/messages",
+    "grpclog",
+    "health",
+    "health/grpc_health_v1",
+    "internal",
+    "keepalive",
+    "metadata",
+    "naming",
+    "peer",
+    "resolver",
+    "resolver/dns",
+    "resolver/passthrough",
+    "stats",
+    "status",
+    "tap",
+    "transport"
+  ]
+  revision = "41344da2231b913fa3d983840a57a6b1b7b631a1"
+  version = "v1.12.0"
+
 [[projects]]
   branch = "v3"
   name = "gopkg.in/alexcesaro/quotedprintable.v3"
@@ -685,6 +774,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "76d5a63bc94bc0a75fe311cbc1df579fdd77b5d039a006236c00ee122ab69c1b"
+  inputs-digest = "2147cb986b5e1ba46b0c4479601fd9829cc46ccbc1bf4e8b9e59dfe0cccad77e"
   solver-name = "gps-cdcl"
   solver-version = 1