Update resource_splunk_configs_conf.go to support ':' and '/' charact…

…ers in stanza of splunk_configs_conf resource

This is required for creation of inputs using the Splunk Addon for AWS, which creates inputs with a name like: aws_sqs_based_s3://s3-bucket-name. 

Link to Splunk Addon for AWS: https://splunk.github.io/splunk-add-on-for-amazon-web-services/

splunk/resource_splunk_configs_conf.go

@@ -32,7 +32,7 @@ func configsConf() *schema.Resource {
 				Type:         schema.TypeString,
 				Required:     true,
 				ForceNew:     true,
-				ValidateFunc: validation.StringMatch(regexp.MustCompile(`^[a-zA-Z0-9_\-.]+/[a-zA-Z0-9_\-.]+`), "A '/' separated string consisting of {conf_file_name}/{stanza_name} ex. props/custom_stanza"),
+				ValidateFunc: validation.StringMatch(regexp.MustCompile(`^[a-zA-Z0-9_\-.]+/[a-zA-Z0-9_\-.:/]+`), "A '/' separated string consisting of {conf_file_name}/{stanza_name} ex. props/custom_stanza"),
 				Description:  `A '/' separated string consisting of {conf_file_name}/{stanza_name} ex. props/custom_stanza`,
 			},
 			"acl": aclSchema(),