drop session :async :interval

passing this as an http parameter, so no need to store in the session

app/controllers/application_controller/wait_for_task.rb

@@ -11,25 +11,23 @@ def wait_for_task
     @edit = session[:edit]  # If in edit, need to preserve @edit object
     raise Forbidden, _('Invalid input for "wait_for_task".') unless params[:task_id]
 
-    session[:async] ||= {}
-    session[:async][:interval] ||= 1000 # Default interval to 1 second
-    async_params = params[:async_params] || session[:async][:params] || {}
+    async_interval = params[:async_interval] || 1000 # Default interval to 1 second
+    async_params = params[:async_params] || session[:async][:params]
 
     if MiqTask.find(params[:task_id].to_i).state != "Finished" # Task not done --> retry
-      browser_refresh_task(params[:task_id], async_params)
+      browser_refresh_task(params[:task_id], async_params, async_interval)
     else # Task done
       async_params.each { |k, v| @_params[k] = v } # Merge in the original params and
       send(async_params[:action]) # call the orig. method
     end
   end
 
-  def browser_refresh_task(task_id, async_params, should_flash: false)
-    session[:async][:interval] += 250 if session[:async][:interval] < 5000 # Slowly move up to 5 second retries
-    session_interval = params[:async_interval] || session[:async][:interval]
+  def browser_refresh_task(task_id, async_params, async_interval, should_flash: false)
+    async_interval += 250 if async_interval < 5000 # Slowly move up to 5 second retries
     render :update do |page|
       page << javascript_prologue
-      ajax_call = remote_function(:url => {:action => 'wait_for_task', :task_id => task_id, :async_params => async_params})
-      page << "setTimeout(\"#{ajax_call}\", #{session_interval});"
+      ajax_call = remote_function(:url => {:action => 'wait_for_task', :task_id => task_id, :async_params => async_params, :async_interval => :async_interval})
+      page << "setTimeout(\"#{ajax_call}\", #{async_interval});"
       page.replace("flash_msg_div", :partial => "layouts/flash_msg") if should_flash
       page << "miqScrollTop();" if @flash_array.present?
     end
@@ -45,8 +43,7 @@ def browser_refresh_task(task_id, async_params, should_flash: false)
   #
   def initiate_wait_for_task(options = {})
     task_id = options[:task_id]
-    session[:async] ||= {}
-    session[:async][:interval] ||= 1000 # Default interval to 1 second
+    async_interval = 1000 # Default interval to 1 second
 
     # save the incoming parms + extra_params
     async_params = params.to_unsafe_h.merge(options[:extra_params] || {})
@@ -62,8 +59,9 @@ def initiate_wait_for_task(options = {})
       async_params[:rx_action] = options[:rx_action]
     end
 
+    session[:async] ||= {}
     session[:async][:params] = async_params
-    browser_refresh_task(task_id, async_params, :should_flash => !!options[:flash])
+    browser_refresh_task(task_id, async_params, async_interval, :should_flash => !!options[:flash])
   end
   private :initiate_wait_for_task