Fixes to CI configs.

- Moves grpcproxy & functional tests to a separate workflows such thay can get restarted independently.
- Configures travis to run 1.16.3 go version (as travis cannot resolve 1.16 to the default).

.github/workflows/grpcproxy.yaml

@@ -0,0 +1,30 @@
+name: grpcProxy-tests
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        target:
+        - linux-amd64-grpcproxy
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-go@v2
+      with:
+        go-version: "^1.16"
+    - run: date
+    - env:
+        TARGET: ${{ matrix.target }}
+      run: |
+        echo "${TARGET}"
+        case "${TARGET}" in
+          linux-amd64-grpcproxy)
+            PASSES='build grpcproxy'  CPU='4' COVER='false' RACE='true' ./test.sh 2>&1 | tee test.log
+            ! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
+            ;;
+          *)
+            echo "Failed to find target"
+            exit 1
+            ;;
+        esac