Have timers be a trigger type in microseconds

Extract and generate timers in microseconds for all event triggers and
actions that take a timer as a parameter.

Tested:
    Timers are created on events with timer triggers defined
    Inspect that generated timers are created in microseconds
    No timer is created for events without a timer trigger

Change-Id: I345f247782779ef142fe0d569632be2b6c11f0c3
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/zone.cpp b/control/zone.cpp
index fddca53..3960533 100644
--- a/control/zone.cpp
+++ b/control/zone.cpp
@@ -376,7 +376,7 @@
     }
     // Attach a timer to run the action of an event
     auto timerConf = std::get<timerConfPos>(event);
-    if (std::get<intervalPos>(timerConf) != seconds(0))
+    if (std::get<intervalPos>(timerConf) != microseconds(0))
     {
         addTimer(std::get<groupPos>(event),
                  std::get<actionsPos>(event),