Tag dovetail with cvp.0.7.0

Tag dovetail with cvp.0.7.0

docker image used
1. opnfv/yardstick: danube.3.2
2. opnfv/functest: cvp.0.5.0
3. opnfv/bottlenecks: cvp.0.4.0
4. opnfv/testapi: cvp.0.5.0
5. opnfv/dovetail:web.cvp.0.7.0
6. opnfv/dovetail:api.cvp.0.7.0
7. opnfv/dovetail: cvp.0.7.0

main changes
1. [cvp-web]correct dockerfile
2. [cvp-web]remove useless docker-compose yaml
3. Bugfix: sdnvpn test cases failed due to wrong module name
4. Support to run mandatory or optional test cases separately
5. [cvp-web]remove workflow on homepage
6. add api&web services for cvp
7. Don't generate tar file when run without pushing results to DB
8. Make Yardstick log level can be set by CLI
9. Update the script for building local DB and testapi
10. Bugfix: tar results dir cannot be parsed by web portal
11. Replacing references to "DefCore"
12. Updating the test specification document with iterative inprovements
13. Dovetail tool replaces defcore with osinterop
14. Clearer structuring current and future test scope of CVP addendum
15. Adding a stub document for a CVP reviewer guide
16. Clarify criteria for testcase inclusion as running in Functest/CI
17. And additional clarifications.
18. add more information for the Identity testcases in the refstack
19. Doc: update user guide due to add new test cases and features

For more information, refer to https://wiki.opnfv.org/display/dovetail/Running+history+for+the+dovetail+tool

JIRA: DOVETAIL-516

Change-Id: Ic65073fd749c1bcdbd0946d081ba2d2fe9105057
Signed-off-by: xudan <xudan16@huawei.com>