etcd: Bump to version 3.2.6 and update all the grpc deps

Note: When go-grpc-prometheus was in the main $gopath (even at this
version) and everyone else was where they always were in vendor/ this
didn't build! It gave errors like:

	have SendHeader("github.com/purpleidea/mgmt/vendor/google.golang.org/grpc/metadata".MD) error
	want SendHeader("google.golang.org/grpc/metadata".MD) error

and I got frustrated. Putting it "next" to the other vendored deps seems
to have fixed this. Where are the golang docs that explain this
phenomenon?

This also requires golang 1.8+ as that is a requirement for etcd. It's
probably a reasonable thing for us too.

Note the older versions of etcd had some bugs with the concurrency
package and other things, so this is a necessary bump.

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "vendor/honnef.co/go/augeas"]
 	path = vendor/honnef.co/go/augeas
 	url = https://github.com/dominikh/go-augeas/
+[submodule "vendor/github.com/grpc-ecosystem/go-grpc-prometheus"]
+	path = vendor/github.com/grpc-ecosystem/go-grpc-prometheus
+	url = https://github.com/grpc-ecosystem/go-grpc-prometheus

.travis.yml

@@ -1,8 +1,7 @@
 language: go
 go:
-  - 1.6.x
-  - 1.7.x
   - 1.8.x
+  - 1.9.x
   - tip
 go_import_path: github.com/purpleidea/mgmt
 sudo: true
@@ -16,7 +15,7 @@ matrix:
   fast_finish: true
   allow_failures:
     - go: tip
-    - go: 1.6.x
+    - go: 1.9.x
 notifications:
   irc:
     channels:

test/shell/file-owner.sh

@@ -9,7 +9,7 @@ if ! timeout 1s sudo -A true; then
 fi
 
 # run till completion
-timeout --kill-after=15s 10s sudo -A ./mgmt run --yaml file-owner.yaml --converged-timeout=5 --no-watch --tmp-prefix &
+timeout --kill-after=30s 25s sudo -A ./mgmt run --yaml file-owner.yaml --converged-timeout=5 --no-watch --tmp-prefix &
 pid=$!
 wait $pid	# get exit status
 e=$?

test/shell/graph-fanin-1.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
-# should take slightly more than 25s, but fail if we take 35s)
-$timeout --kill-after=35s 30s ./mgmt run --yaml graph-fanin-1.yaml --converged-timeout=5 --no-watch --tmp-prefix --no-pgp &
+# should take more than 25s plus overhead
+$timeout --kill-after=50s 45s ./mgmt run --yaml graph-fanin-1.yaml --converged-timeout=5 --no-watch --tmp-prefix --no-pgp &
 pid=$!
 wait $pid	# get exit status
 exit $?

test/shell/t7.sh

@@ -1,9 +1,9 @@
 #!/bin/bash -e
 
 # run empty graph
-$timeout --kill-after=20s 15s ./mgmt run --tmp-prefix &
+$timeout --kill-after=45s 35s ./mgmt run --tmp-prefix --no-pgp &
 pid=$!
-sleep 5s	# let it converge
+sleep 10s	# let it converge
 $(sleep 3s && killall -SIGINT mgmt)&	# send ^C to exit mgmt
 wait $pid	# get exit status
 exit $?

test/test-gofmt.sh

@@ -10,11 +10,11 @@ set -o pipefail
 
 ROOT=$(dirname "${BASH_SOURCE}")/..
 
-GO_VERSION=($(go version))
-
-if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|devel') ]]; then
-	fail_test "Unknown go version '${GO_VERSION[2]}', failing gofmt."
-fi
+#GO_VERSION=($(go version))
+#
+#if [[ -z $(echo "${GO_VERSION[2]}" | grep -E 'go1.2|go1.3|go1.4|go1.5|go1.6|go1.7|go1.8|go1.9|devel') ]]; then
+#	fail_test "Unknown go version '${GO_VERSION[2]}', failing gofmt."
+#fi
 
 cd "${ROOT}"