Revert "Removed useless method _get_default_deleted_value."
Revert "Removed useless method _get_default_deleted_value."

This reverts commit ecf74d4c0a5a8a4290ecac048fc437dafe3d40fc.

This change actually makes the archiving potentially destroy
all your data. See ML thread:

http://lists.openstack.org/pipermail/openstack-dev/2015-March/059034.html

In future 'useless' parts of sqla interface would be nice to have
tests around before they get dumped.

Change-Id: I769f22440ea84c6010b86ea4e074e75c0e7c9168
isyippee/nova,noironetworks/nova,eonpatapon/nova,hanlind/nova,Francis-Liu/animated-broccoli,MountainWei/nova,edulramirez/nova,gooddata/openstack-nova,cyx1231st/nova,jianghuaw/nova,tangfeixiong/nova,alaski/nova,klmitch/nova,raildo/nova,cloudbase/nova,akash1808/nova,blueboxgroup/nova,bigswitch/nova,fnordahl/nova,varunarya10/nova_test_latest,adelina-t/nova,JioCloud/nova,iuliat/nova,mmnelemane/nova,CEG-FYP-OpenStack/scheduler,zaina/nova,tealover/nova,CCI-MOC/nova,sebrandon1/nova,apporc/nova,mahak/nova,watonyweng/nova,zzicewind/nova,tangfeixiong/nova,barnsnake351/nova,dawnpower/nova,Tehsmash/nova,dims/nova,devendermishrajio/nova,Juniper/nova,jianghuaw/nova,petrutlucian94/nova,phenoxim/nova,openstack/nova,isyippee/nova,kimjaejoong/nova,NeCTAR-RC/nova,phenoxim/nova,alaski/nova,joker946/nova,ted-gould/nova,devendermishrajio/nova_test_latest,Stavitsky/nova,dawnpower/nova,rajalokan/nova,BeyondTheClouds/nova,cernops/nova,NeCTAR-RC/nova,eonpatapon/nova,openstack/nova,Yusuke1987/openstack_template,adelina-t/nova,akash1808/nova_test_latest,CCI-MOC/nova,devendermishrajio/nova_test_latest,BeyondTheClouds/nova,mikalstill/nova,rajalokan/nova,gooddata/openstack-nova,yosshy/nova,belmiromoreira/nova,mandeepdhami/nova,JioCloud/nova_test_latest,blueboxgroup/nova,CloudServer/nova,rahulunair/nova,j-carpentier/nova,MountainWei/nova,shail2810/nova,mikalstill/nova,edulramirez/nova,belmiromoreira/nova,Francis-Liu/animated-broccoli,raildo/nova,mmnelemane/nova,bgxavier/nova,CloudServer/nova,LoHChina/nova,zaina/nova,nikesh-mahalka/nova,tudorvio/nova,bgxavier/nova,jianghuaw/nova,whitepages/nova,LoHChina/nova,varunarya10/nova_test_latest,nikesh-mahalka/nova,BeyondTheClouds/nova,vmturbo/nova,whitepages/nova,alvarolopez/nova,vmturbo/nova,cloudbase/nova,j-carpentier/nova,thomasem/nova,devendermishrajio/nova,yatinkumbhare/openstack-nova,openstack/nova,Yusuke1987/openstack_template,jeffrey4l/nova,iuliat/nova,vmturbo/nova,rajalokan/nova,hanlind/nova,tudorvio/nova,klmitch/nova,double12gzh/nova,JianyuWang/nova,gooddata/openstack-nova,Juniper/nova,cernops/nova,JioCloud/nova,takeshineshiro/nova,takeshineshiro/nova,shail2810/nova,tealover/nova,cernops/nova,ruslanloman/nova,JioCloud/nova_test_latest,rahulunair/nova,scripnichenko/nova,scripnichenko/nova,felixma/nova,hanlind/nova,alexandrucoman/vbox-nova-driver,akash1808/nova,TwinkleChawla/nova,petrutlucian94/nova,alvarolopez/nova,felixma/nova,joker946/nova,watonyweng/nova,sebrandon1/nova,rajalokan/nova,jianghuaw/nova,noironetworks/nova,sebrandon1/nova,klmitch/nova,alexandrucoman/vbox-nova-driver,yatinkumbhare/openstack-nova,vmturbo/nova,fnordahl/nova,kimjaejoong/nova,mahak/nova,Stavitsky/nova,Juniper/nova,rahulunair/nova,ruslanloman/nova,zzicewind/nova,klmitch/nova,dims/nova,mikalstill/nova,mandeepdhami/nova,thomasem/nova,CEG-FYP-OpenStack/scheduler,apporc/nova,jeffrey4l/nova,barnsnake351/nova,cloudbase/nova,double12gzh/nova,akash1808/nova_test_latest,JianyuWang/nova,zhimin711/nova,TwinkleChawla/nova,bigswitch/nova,Tehsmash/nova,Juniper/nova,mahak/nova,yosshy/nova,cyx1231st/nova,gooddata/openstack-nova,ted-gould/nova,zhimin711/nova