Long bootstrap time on large LDAP trees

[pmauduit]

The issue has been encountered in a mapstore2-geOrchestra context and has been documented on this specific issue:
georchestra/mapstore2-georchestra#735

At bootstrap, the GeoStoreInit iterates over the LDAP users into the method initPasswordEncoding, and on large LDAP directories, this can take a certain amount of time.

In a setup with ~ 8k users, we came up with a patch which will shunt the initPasswordEncoding() logic (see mentioned issue above), so that we make sure the mapstore webapp can come to life on time in regards to the default (1 minute 15 sec max) startup probes configured in the geOrchestra helm chart.