Add Yasufumi Ogawa candidacy for Tacker PTL

Signed-off-by: Yasufumi Ogawa <yasufum.o@gmail.com>
Change-Id: Id481615574cc7f9e8f9308a1197bfc2e8c745705

candidates/xena/Tacker/yasufum.o@gmail.com

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+Hi,
+
+I'd like to propose my candidacy for Tacker PTL in Xena cycle.
+
+In Wallaby release, we have released several features for the latest ETSI NFV
+standard while largely updating infras, such as moving to Ubuntu 20.04,
+supporting redhat distros again and dropping python2 completely for not only
+Tacker but also related projects such as tosca-parser or heat-translator or so
+[1]. In addition, we have fixed instability in unit and functional tests for
+which we have troubles several times. As Tacker PTL, I've led the team by
+proposing not only new features, but also things for driving the team such as
+documentation or bug tracking.
+
+In Xena cycle, I would like to continue to make Tacker be more useful product
+for users interested in NFV. I believe Tacker will be a good reference
+implementation for NFV standard. We have planed to make Tacker more feasible not
+only for VM environment, but also container to meet requirements from
+industries.
+
+- Continue to implement the latest container technology with ETSI NFV standard.
+- Introduce multi API versions to meet the requirements for operators enable to
+  deploy mixed environment of multi-vendor products in which some products
+  provide a stable version APIs while other products adopt move advanced ones.
+- Proceed to design and implement test framework under development in ETSI NFV
+  TST to improve the quality of the product, not only unit tests and
+  functional tests, but also introduce more sophisticated scheme such as robot
+  framework.
+
+[1] https://docs.openstack.org/releasenotes/tacker/unreleased.html
+
+Regards,
+Yasufumi Ogawa
+IRC: yasufum