ot_gv has a redundant configuration setting for order-status

ot_gv has a redundant configuration setting for order-status; needs to be removed #73
Also added MODULE_ORDER_TOTAL_GV_SPECIAL to allow GVs to be on specials.
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- [ ] <a href='#crh-comment-Pull cf6e25e68a163a7e7fc982d3b1c407ed52493bde zc_install/sql/updates/mysql_upgrade_zencart_160.sql 4'></a> <img src='http://www.codereviewhub.com/site/github-remaining.png' height=16 width=60>&nbsp;<b><a href='https://github.com/zencart/zc-v1-series/pull/74#discussion_r14724188'>File: zc_install/sql/updates/mysql_upgrade_zencart_160.sql:L60-69</a></b>
- <a href='https://github.com/drbyte'><img border=0 src='https://avatars.githubusercontent.com/u/404472?size=16' height=16 width=16'></a> I wonder whether this might cause troubles if the ot_gv module isn't already installed, since when one tries to install it the module will attempt to insert this value which already exists...


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