Updated default secret mount path value

This changes updates the secret mount path default value to
/var/openfaas/secrets at serveral places. It has been changed
from /run/secrets/ to /var/openfaas/secrets after version 0.8.2

Signed-off-by: Vivek Singh <vivekkmr45@yahoo.in>

gateway/README.md

@@ -55,4 +55,4 @@ The gateway can be configured through the following environment variables:
 | `direct_functions`            | `true` or `false` -  functions are invoked directly over overlay network without passing through provider |
 | `direct_functions_suffix`     | Provide a DNS suffix for invoking functions directly over overlay network  |
 | `basic_auth`              | Set to `true` or `false` to enable embedded basic auth on the /system and /ui endpoints (recommended) |
-| `secret_mount_path`       | Set a location where you have mounted `basic-auth-user` and `basic-auth-password`, default: `/run/secrets/`. |
+| `secret_mount_path`       | Set a location where you have mounted `basic-auth-user` and `basic-auth-password`, default: `/var/openfaas/secrets/`. |

gateway/types/readconfig.go

@@ -109,7 +109,7 @@ func (ReadConfig) Read(hasEnv HasEnv) GatewayConfig {
 
 	secretPath := hasEnv.Getenv("secret_mount_path")
 	if len(secretPath) == 0 {
-		secretPath = "/run/secrets/"
+		secretPath = "/var/openfaas/secrets/"
 	}
 	cfg.SecretMountPath = secretPath
 

gateway/types/readconfig_test.go

@@ -210,7 +210,7 @@ func TestRead_BasicAuthDefaults(t *testing.T) {
 		t.Fail()
 	}
 
-	wantSecretsMount := "/run/secrets/"
+	wantSecretsMount := "/var/openfaas/secrets/"
 	if config.SecretMountPath != wantSecretsMount {
 		t.Logf("config.SecretMountPath, want: %s, got: %s\n", wantSecretsMount, config.SecretMountPath)
 		t.Fail()