Clear execute bits from some files that shoulnd't have them set.

(cherry picked from commit 41520567bf654231b784650288eac28b9f355b1d)
Add synchronization of configuration for HA hubs.

Synchronize notification_scripts directory to copy notifications scripts
form active to passive hubs.
DON'T use u_rcp for copying files from one hub to another.
Allow access to needed configuration files for all hubs in HA installation.

(cherry picked from commit 18a79273cd710fdfcf7a44495cabbb00c5866d1f)