Moving from govendor to dep, updated dependencies (#48)

* Moving from govendor to dep.

* Making the pull request template more friendly.

* Fixing akward space in PR template.

* goimports run on whole project using ` goimports -w $(find . -type f -name '*.go' -not -path "./vendor/*" -not -path "./gen-go/*")`

source of command: https://gist.github.com/bgentry/fd1ffef7dbde01857f66

vendor/github.com/samuel/go-zookeeper/zk/lock_test.go

@@ -0,0 +1,94 @@
+package zk
+
+import (
+	"testing"
+	"time"
+)
+
+func TestLock(t *testing.T) {
+	ts, err := StartTestCluster(1, nil, logWriter{t: t, p: "[ZKERR] "})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ts.Stop()
+	zk, _, err := ts.ConnectAll()
+	if err != nil {
+		t.Fatalf("Connect returned error: %+v", err)
+	}
+	defer zk.Close()
+
+	acls := WorldACL(PermAll)
+
+	l := NewLock(zk, "/test", acls)
+	if err := l.Lock(); err != nil {
+		t.Fatal(err)
+	}
+	if err := l.Unlock(); err != nil {
+		t.Fatal(err)
+	}
+
+	val := make(chan int, 3)
+
+	if err := l.Lock(); err != nil {
+		t.Fatal(err)
+	}
+
+	l2 := NewLock(zk, "/test", acls)
+	go func() {
+		if err := l2.Lock(); err != nil {
+			t.Fatal(err)
+		}
+		val <- 2
+		if err := l2.Unlock(); err != nil {
+			t.Fatal(err)
+		}
+		val <- 3
+	}()
+	time.Sleep(time.Millisecond * 100)
+
+	val <- 1
+	if err := l.Unlock(); err != nil {
+		t.Fatal(err)
+	}
+	if x := <-val; x != 1 {
+		t.Fatalf("Expected 1 instead of %d", x)
+	}
+	if x := <-val; x != 2 {
+		t.Fatalf("Expected 2 instead of %d", x)
+	}
+	if x := <-val; x != 3 {
+		t.Fatalf("Expected 3 instead of %d", x)
+	}
+}
+
+// This tests creating a lock with a path that's more than 1 node deep (e.g. "/test-multi-level/lock"),
+// when a part of that path already exists (i.e. "/test-multi-level" node already exists).
+func TestMultiLevelLock(t *testing.T) {
+	ts, err := StartTestCluster(1, nil, logWriter{t: t, p: "[ZKERR] "})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ts.Stop()
+	zk, _, err := ts.ConnectAll()
+	if err != nil {
+		t.Fatalf("Connect returned error: %+v", err)
+	}
+	defer zk.Close()
+
+	acls := WorldACL(PermAll)
+	path := "/test-multi-level"
+	if p, err := zk.Create(path, []byte{1, 2, 3, 4}, 0, WorldACL(PermAll)); err != nil {
+		t.Fatalf("Create returned error: %+v", err)
+	} else if p != path {
+		t.Fatalf("Create returned different path '%s' != '%s'", p, path)
+	}
+	l := NewLock(zk, "/test-multi-level/lock", acls)
+	defer zk.Delete("/test-multi-level", -1) // Clean up what we've created for this test
+	defer zk.Delete("/test-multi-level/lock", -1)
+	if err := l.Lock(); err != nil {
+		t.Fatal(err)
+	}
+	if err := l.Unlock(); err != nil {
+		t.Fatal(err)
+	}
+}