rpc rewrite: control RPCs using gRPC + separate RPC for data transfer

transport/ssh: update go-netssh to new version
    => supports CloseWrite and Deadlines
    => build: require Go 1.11 (netssh requires it)

rpc/dataconn/timeoutconn/internal/wireevaluator/testbed/templates/ssh.yml.j2

@@ -0,0 +1,13 @@
+connect:
+  type: ssh+stdinserver
+  host: {{wireevaluator_serve_ip}}
+  user: root
+  port: 22
+  identity_file: /opt/wireevaluator.ssh_client_identity
+  options: # optional, default [], `-o` arguments passed to ssh
+  - "Compression=yes"
+serve:
+  type: stdinserver
+  client_identities:
+    - "client1"
+

rpc/dataconn/timeoutconn/internal/wireevaluator/testbed/templates/tcp.yml.j2

@@ -0,0 +1,10 @@
+connect:
+    type: tcp
+    address: "{{wireevaluator_serve_ip}}:8888"
+serve:
+    type: tcp
+    listen: ":8888"
+    clients: {
+        "{{wireevaluator_connect_ip}}" : "client1"
+    }
+

rpc/dataconn/timeoutconn/internal/wireevaluator/testbed/templates/tls.yml.j2

@@ -0,0 +1,16 @@
+connect:
+  type: tls
+  address: "{{wireevaluator_serve_ip}}:8888"
+  ca: "/opt/wireevaluator.tls.ca.crt"
+  cert: "/opt/wireevaluator.tls.theclient.crt"
+  key: "/opt/wireevaluator.tls.theclient.key"
+  server_cn: "theserver"
+
+serve:
+  type: tls
+  listen: ":8888"
+  ca: "/opt/wireevaluator.tls.ca.crt"
+  cert: "/opt/wireevaluator.tls.theserver.crt"
+  key: "/opt/wireevaluator.tls.theserver.key"
+  client_cns:
+    - "theclient"