NXP-14911 cleanup and format code
NXP-14911: Remove deprecated methods and deprecate getEntries in directory session

Removed deprecated org.nuxeo.ecm.directory.Session.commit() and org.nuxeo.ecm.directory.Session.rollback()
Deprecate org.nuxeo.ecm.directory.Session.getEntries()
NXP-14911 Remove deprecated methods and deprecate getEntries in directory session

format and cleanup code
NXP-14911 Remove deprecated methods and deprecate getEntries in directory session

Remove call to deleted session commit methods
NXP-14914 Delete SQLDirectoryProxy and LDAPDirectoryProxy class

Remove LDAPDirectoryProxy, use the LDAPDirectory instead
NXP-14914 Delete SQLDirectoryProxy and LDAPDirectoryProxy class

Remove the SQLDirectoryProxy class and use the SQLDirectory instead
NXP-14914 Delete SQLDirectoryProxy and LDAPDirectoryProxy class

Move some init code from constructor to a dedicated method to be called in the getSession to allow nuxeo start  directory component even if some other contrib (suche as schema types) are loaded after
NXP-14914 Delete SQLDirectoryProxy and LDAPDirectoryProxy class

change init method visibility and comment