Lowercase some errors

This commit is courtesy of

```
for f in $(git ls-files *.go | grep -v ^vendor/); do \
	sed -i 's/\(errors\..*\)"Error /\1"error /' $f;
done

for f in $(git ls-files *.go | grep -v ^vendor/); do \
	sed -i 's/\(errors\..*\)"Failed to /\1"failed to /' $f;
done

```

etc.

Self-reviewed using `git diff --word-diff`, found no issues.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/pkg/api/handlers/utils/containers.go b/pkg/api/handlers/utils/containers.go
index b6613fdfd..185b724fc 100644
--- a/pkg/api/handlers/utils/containers.go
+++ b/pkg/api/handlers/utils/containers.go
@@ -27,7 +27,7 @@ func WaitContainer(w http.ResponseWriter, r *http.Request) (int32, error) {
 		// Override golang default values for types
 	}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+		Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return 0, err
 	}
 	if _, found := r.URL.Query()["interval"]; found {
diff --git a/pkg/api/handlers/utils/errors.go b/pkg/api/handlers/utils/errors.go
index bf9b18960..fc77b8ec0 100644
--- a/pkg/api/handlers/utils/errors.go
+++ b/pkg/api/handlers/utils/errors.go
@@ -90,7 +90,7 @@ func InternalServerError(w http.ResponseWriter, err error) {
 }
 
 func BadRequest(w http.ResponseWriter, key string, value string, err error) {
-	e := errors.Wrapf(err, "Failed to parse query parameter '%s': %q", key, value)
+	e := errors.Wrapf(err, "failed to parse query parameter '%s': %q", key, value)
 	Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest, e)
 }