Run test with coverage job separately

Resolves grafana#1640 (comment)

.github/workflows/all.yml

@@ -61,7 +61,26 @@ jobs:
       matrix:
         go-version: [1.14.x, 1.15.x]
         platform: [ubuntu-latest, windows-latest]
+        exclude:
+          # This environment is used in test-coverage.
+          - platform: ubuntu-latest
+            go-version: 1.15.x
     runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Run tests
+        run: |
+          go version
+          export GOMAXPROCS=2
+          go test -p 2 -race -timeout 800s ./...
+
+  test-coverage:
+    runs-on: ubuntu-latest
     env:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
     steps:
@@ -70,12 +89,11 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: ${{ matrix.go-version }}
+          go-version: 1.15.x
       - name: Run tests with code coverage
         run: |
           go version
           export GOMAXPROCS=2
-          export PATH=$GOPATH/bin:$PATH
           echo "mode: set" > coverage.txt
           for pkg in $(go list ./... | grep -v vendor); do
               list=$(go list -test -f  '{{ join .Deps  "\n"}}' $pkg | grep github.com/loadimpact/k6 | grep -v vendor || true)