Avoid calling the database in case of exception for a period configured #3941
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If There is an exception while sending a query to the database, we should update last_update time to NOW so that no query is send to the data base for another update_interval as configured.
This correction avoids access to the data for each service as street_network, external_service as well as bss_provide for a period of update_interval as configured.
There are some minor modifications to reduce possible error.
Relates to: https://navitia.atlassian.net/browse/NAV-1819