Multiple portability issues in archived logs test

[Alexey Kopytov]

xb_apply_archived_logs.sh contains many unnecessary constructs based on GNU extensions to standard Unix utilties.

Examples:

   local lsn=`echo $i | sed -s 's/ib_log_archive_\([0-9]\+\)/\1/'`

This construct 1) doesn't need '-s' and 2) uses extended regexp syntax

 for i in `find . -type f -printf "%T+ %p\n" | cut -d' ' -f2`;

This construct doesn't actually need -printf and all subsequent pushups to normalize the custom filename format.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-900