psu-ng: Bump the psu validation timeout

It was observed that during a BMC reset at runtime, other processes may
slow down the EM signal generation and the validation function would run
and log an error because not all the information about present power
supplies was in D-Bus yet.

Bump the timeout to 10s to avoid any false errors. This does not block
any processes from running.

Tested: Verified with debug traces that the validation runs 10s after
the timer is started.

Change-Id: I0aa64bcea504f604b49b06151b1391c72aa16cc6
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/phosphor-power-supply/psu_manager.hpp b/phosphor-power-supply/psu_manager.hpp
index 9a94b64..edc296f 100644
--- a/phosphor-power-supply/psu_manager.hpp
+++ b/phosphor-power-supply/psu_manager.hpp
@@ -21,9 +21,9 @@
 namespace phosphor::power::manager
 {
 
-// Validation timeout. The EM interfaces are added about every second or less,
-// so double that time to 2s for the timeout value.
-constexpr auto validationTimeout = std::chrono::milliseconds(2000);
+// Validation timeout. Allow 10s to detect if new EM interfaces show up in D-Bus
+// before performing the validation.
+constexpr auto validationTimeout = std::chrono::seconds(10);
 
 /**
  * @class PSUManager