Update TOC page to add Eric (kubernetes#657)

* Update TOC page to add Eric

Welcome Eric!!

* replace Brian with Eric

* replace Brian with Avery on TOC group

TECH-OVERSIGHT-COMMITTEE.md

@@ -65,7 +65,7 @@ The members of the TOC are shown below. Membership in the TOC is determined by t
 <img width="30px" src="https://avatars1.githubusercontent.com/u/1588319?s=400&v=4"> | [Lin Sun](https://github.com/linsun) | Solo.io
 <img width="30px" src="https://avatars3.githubusercontent.com/u/12534779?s=400&v=4">| [Neeraj Poddar](https://github.com/nrjpoddar) | Solo.io
 <img width="30px" src="https://avatars.githubusercontent.com/u/623453?v=4">         | [John Howard](https://github.com/howardjohn) | Google
-<img width="30px" src="https://avatars.githubusercontent.com/u/8484260?v=4">        | [Brian Avery](https://github.com/brian-avery) | Red Hat
+<img width="30px" src="https://avatars.githubusercontent.com/u/10537847?v=4">        | [Eric Van Norman](https://github.com/ericvn) | IBM
 
 ## Emeritus members
 
@@ -76,6 +76,7 @@ the success of the Istio community:
 * Shriram Rajagopalan
 * Daniel Berg
 * Joshua Blatt
+* Brian Avery
 
 ## Getting in touch
 

org/admins.yaml

@@ -1,6 +1,6 @@
 # Please add your name in alphabetical order.
 admins:
-- brian-avery
+- ericvn
 - google-admin
 - googlebot
 - howardjohn

org/teams.yaml

@@ -472,7 +472,7 @@ teams:
   Technical Oversight Committee:
     description: Members of the Istio TOC.
     members:
-      - brian-avery
+      - ericvn
       - howardjohn
       - linsun
       - louiscryan