Update i18n translation for Metaplugin plugin

All the existing LOG.info, LOG.warning, LOG.error and LOG.critical
messages should have _LI, _LW, _LE and _LC respectively. Also, debug
level log shouldn't be translated. This patch set will cover the
metaplugin directory.

Change-Id: I34437019fc8ffc38f11114d1d83dce54170ab989
Partial-Bug: #1320867
Merge "Update i18n translation for Metaplugin plugin"