Add "x-compute-request-id" to a response header
Add "x-compute-request-id" to a response header

The commit I5e370fd3de5ee2f8a8d13553015d88910ff5ea87 changed
"x-compute-request-id" to "x-openstack-request-id" on v2.1 API.
But this change is backwards incompatible against v2.0 API.

This patch makes all v2.1 APIs return "x-compute-request-id" in
the header.

Partially implements blueprint v2-on-v3-api

Change-Id: Ibe46e4004a7124ddc9a622fa7f26b9ec10a9a702

alvarolopez/nova,devendermishrajio/nova_test_latest,dims/nova,cernops/nova,NeCTAR-RC/nova,zhimin711/nova,adelina-t/nova,takeshineshiro/nova,gooddata/openstack-nova,scripnichenko/nova,fnordahl/nova,JianyuWang/nova,mahak/nova,JioCloud/nova,mmnelemane/nova,cyx1231st/nova,scripnichenko/nova,felixma/nova,Francis-Liu/animated-broccoli,CloudServer/nova,JioCloud/nova_test_latest,bgxavier/nova,thomasem/nova,kimjaejoong/nova,eonpatapon/nova,raildo/nova,akash1808/nova,noironetworks/nova,orbitfp7/nova,hanlind/nova,felixma/nova,Juniper/nova,jeffrey4l/nova,ted-gould/nova,vmturbo/nova,apporc/nova,cyx1231st/nova,double12gzh/nova,mikalstill/nova,akash1808/nova_test_latest,silenceli/nova,bigswitch/nova,takeshineshiro/nova,edulramirez/nova,cernops/nova,yosshy/nova,alexandrucoman/vbox-nova-driver,barnsnake351/nova,eonpatapon/nova,mandeepdhami/nova,mikalstill/nova,BeyondTheClouds/nova,jianghuaw/nova,jeffrey4l/nova,hanlind/nova,JioCloud/nova_test_latest,MountainWei/nova,j-carpentier/nova,rahulunair/nova,Stavitsky/nova,yatinkumbhare/openstack-nova,ted-gould/nova,akash1808/nova,belmiromoreira/nova,vmturbo/nova,mikalstill/nova,rajalokan/nova,sebrandon1/nova,TwinkleChawla/nova,JianyuWang/nova,yosshy/nova,noironetworks/nova,LoHChina/nova,watonyweng/nova,dawnpower/nova,zzicewind/nova,nikesh-mahalka/nova,jianghuaw/nova,dawnpower/nova,joker946/nova,CEG-FYP-OpenStack/scheduler,dims/nova,MountainWei/nova,yatinkumbhare/openstack-nova,Metaswitch/calico-nova,cloudbase/nova,barnsnake351/nova,isyippee/nova,whitepages/nova,tangfeixiong/nova,cloudbase/nova-virtualbox,cloudbase/nova-virtualbox,iuliat/nova,belmiromoreira/nova,iuliat/nova,akash1808/nova_test_latest,tangfeixiong/nova,devendermishrajio/nova,projectcalico/calico-nova,Tehsmash/nova,devendermishrajio/nova,bgxavier/nova,klmitch/nova,Juniper/nova,Juniper/nova,JioCloud/nova,tudorvio/nova,varunarya10/nova_test_latest,BeyondTheClouds/nova,CCI-MOC/nova,raildo/nova,nikesh-mahalka/nova,alaski/nova,thomasem/nova,varunarya10/nova_test_latest,edulramirez/nova,tealover/nova,alvarolopez/nova,rajalokan/nova,Francis-Liu/animated-broccoli,CCI-MOC/nova,blueboxgroup/nova,BeyondTheClouds/nova,LoHChina/nova,ruslanloman/nova,mahak/nova,joker946/nova,affo/nova,ruslanloman/nova,vmturbo/nova,vmturbo/nova,gooddata/openstack-nova,petrutlucian94/nova,affo/nova,sebrandon1/nova,rahulunair/nova,phenoxim/nova,zaina/nova,TwinkleChawla/nova,double12gzh/nova,tudorvio/nova,rajalokan/nova,silenceli/nova,sebrandon1/nova,jianghuaw/nova,klmitch/nova,hanlind/nova,mahak/nova,adelina-t/nova,devendermishrajio/nova_test_latest,fnordahl/nova,rajalokan/nova,CloudServer/nova,mgagne/nova,bigswitch/nova,Tehsmash/nova,petrutlucian94/nova,blueboxgroup/nova,isyippee/nova,apporc/nova,cernops/nova,klmitch/nova,mgagne/nova,Metaswitch/calico-nova,shail2810/nova,zaina/nova,j-carpentier/nova,alaski/nova,zzicewind/nova,kimjaejoong/nova,Yusuke1987/openstack_template,whitepages/nova,Stavitsky/nova,projectcalico/calico-nova,NeCTAR-RC/nova,phenoxim/nova,watonyweng/nova,gooddata/openstack-nova,gooddata/openstack-nova,Juniper/nova,CEG-FYP-OpenStack/scheduler,openstack/nova,cloudbase/nova,zhimin711/nova,rahulunair/nova,openstack/nova,mandeepdhami/nova,orbitfp7/nova,alexandrucoman/vbox-nova-driver,mmnelemane/nova,Yusuke1987/openstack_template,openstack/nova,tealover/nova,klmitch/nova,shail2810/nova,jianghuaw/nova,cloudbase/nova