Move tep between internal memory and sd card

Move tep between internal memory and sd card

This commit:
 - keeps tep name as ${pkgid}-${appstore_hash}.tep,
 - adds helper functions for tep paths,
 - adds support for copying tep file to external storage,
 - adds moving tep in move request.

Requires:
 - https://review.tizen.org/gerrit/#/c/74045/

Submit together:
 - https://review.tizen.org/gerrit/#/c/74068/
 - https://review.tizen.org/gerrit/#/c/74293/
 - https://review.tizen.org/gerrit/#/c/74294/

Change-Id: I17ce7aafcbe85b731aaf9356c2c55427f79e5769