Issue #390 notify users update labels

[phill54]

this is my fix for issue #390

/* orignal code was

• $queryParam = '?'.http_build_query(['notifyUsers' => $notifyUsers]);
• which results in
• /issue/ISSUE-1234?notifyUsers=0 or
• /issue/ISSUE-1234?notifyUsers=1
• this has two issues:

• 1

• the rest-api is expecting a string. any other value than
• /issue/ISSUE-1234?notifyUsers=false or
• /issue/ISSUE-1234?notifyUsers=true
• will cause a 403 response with the errorMessage
• "To discard the user notification either admin or project admin permissions are required."
• but only if you dont have admin or project admin permissions. (!)

• 2

• this is default
• /issue/ISSUE-1234?notifyUsers=true
• so there's no need to add this */