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, 4 insertions, 4 deletions

diff --git a/pkg/api/handlers/libpod/networks.go b/pkg/api/handlers/libpod/networks.go
index b3c4840b8..b7e2b3988 100644
--- a/pkg/api/handlers/libpod/networks.go
+++ b/pkg/api/handlers/libpod/networks.go
@@ -28,7 +28,7 @@ func CreateNetwork(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
 	}
 	ic := abi.ContainerEngine{Libpod: runtime}
@@ -50,7 +50,7 @@ func ListNetworks(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
 	}
 
@@ -76,7 +76,7 @@ func RemoveNetwork(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)
@@ -109,7 +109,7 @@ func InspectNetwork(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)