webadmin: make query and filter options set in browser session-specific ...

...(alarms, poolqueueplots)

module: webadmin

The alarms and pool queue plots pages were erroneously storing query settings at the server level.  These were thus unintentionally being shared across user sessions.

This patch rectifies this behavior so that user settings do not interfere with each other.

Target: master
Committed: master@21b6b73bbcb27987891715b29657687d90114766
Patch: http://rb.dcache.org/r/5577
Require-notes: yes
Require-book: no
Request: 2.6
Acked-by: Tigran

Testing Done: With two different browsers with different settings.

RELEASE NOTES

Fixes a bug in the web pages for Alarms and Pool Queue Plots where the settings selected by a user/session would become global.  The fix now isolates user/session settings from each other.