Metric ID not escaped in MetricClient.update_tags

[pilhuhn]

The metric:

get "http://localhost:8080/hawkular/metrics/gauges/MI~R~%5b70c798a0-6985-4f8a-a525-012d8d28e8a3%2fLocal~~%5d~MT~WildFly%20Aggregated%20Web%20Metrics~Aggregated%20Active%20Web%20Sessions", "Accept"=>"application/json", "Accept-Encoding"=>"gzip, deflate", "Content-Type"=>"application/json", "Hawkular-tenant"=>"hawkular"
# => 200 OK | application/json 238 bytes
{"id":"MI~R~[70c798a0-6985-4f8a-a525-012d8d28e8a3/Local~~]~MT~WildFly Aggregated Web Metrics~Aggregated Active Web Sessions"

Exception when calling MetricClient.update_tags
bad URI(is not URI?): http://localhost:8080/hawkular/metrics/gauges/MI~R~[70c798a0-6985-4f8a-a525-012d8d28e8a3/Local~~]~MT~WildFly Aggregated Web Metrics~Aggregated Active Web Sessions/tags
( see spaces and [ and / characters )

also potentially applies to other methods.