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>

1 files changed, 3 insertions, 3 deletions

diff --git a/pkg/api/handlers/libpod/volumes.go b/pkg/api/handlers/libpod/volumes.go
index d87e79c21..b0d40fd8b 100644
--- a/pkg/api/handlers/libpod/volumes.go
+++ b/pkg/api/handlers/libpod/volumes.go
@@ -27,7 +27,7 @@ func CreateVolume(w http.ResponseWriter, r *http.Request) {
 	input := entities.VolumeCreateOptions{}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
 		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
-			errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
 	// decode params from body
@@ -124,7 +124,7 @@ func ListVolumes(w http.ResponseWriter, r *http.Request) {
 
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
 		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
-			errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
 
@@ -207,7 +207,7 @@ func RemoveVolume(w http.ResponseWriter, r *http.Request) {
 
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
 		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
-			errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
 	name := utils.GetName(r)