PEL:  Increase host full timeout val in test

The host notifier testcase depends on catching the host full retry timer
after it starts but before it trips.  Occasionally in CI when a lot of
of work is being done in parallel this wasn't happening so the testcase
would fail.  Increase the timeout value from 20ms to 400ms which is
hopefully enough.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: Id8d1c7a800f9da932d85da7ed3bf6d6e5400a24e
diff --git a/test/openpower-pels/mocks.hpp b/test/openpower-pels/mocks.hpp
index e00e006..8b055dd 100644
--- a/test/openpower-pels/mocks.hpp
+++ b/test/openpower-pels/mocks.hpp
@@ -109,7 +109,7 @@
      */
     virtual std::chrono::milliseconds getHostFullRetryDelay() const override
     {
-        return std::chrono::milliseconds(20);
+        return std::chrono::milliseconds(400);
     }
 
     /**