stop refresh hosts when not active
stop refresh hosts when not active

When the user moves out of hosts page,
the automatic refresh will be stopped.

Signed-off-by: Kanagaraj M <a744b691cd98174fb19a473a8cf78b810491e452@redhat.com>

kmkanagaraj/usm-client-2,kmkanagaraj/usm-client-2,cloudbehl/tendrl_frontend,Tendrl/dashboard,kmkanagaraj/usm-client-2,skyrings/kitoon,skyrings/kitoon,Tendrl/dashboard,cloudbehl/tendrl_frontend,skyrings/kitoon