Label selectors not implemented correctly (wrong "arg_separator") - e.g. in HasPods::getPods()

[dev-maniac]

Label selector is just built via normal http_build_query() without providing more arguments than desired label selectors:

$labelSelector = urldecode(http_build_query(
    $this->podsSelector()
));

This builds the selector like a normal query string - e.g. label1=value1&label2=value2 - but this results in api request /api/v1/namespaces/my-namespace/pods?labelSelector=label1=value1&label2=value2&pretty=1 which will only use first label, since labelSelector ends after value1 (due to & located IN label selector).

Entries of labelSelector need to be separated via comma (,). This can be achieved by providing third argument ($arg_separator) to http_build_query():

$labelSelector = urldecode(http_build_query(
    $this->podsSelector(),
    "",
    ","
));