Set CI to pull Core at v0.16dev0

.github/workflows/test.yml

@@ -5,6 +5,8 @@ on:
     branches-ignore:
     - 'release/*'
   pull_request:
+env:
+  CORE_REPO_SHA: 47483865854c7adae7455f8441dab7f814f4ce2a
 
 jobs:
   build:
@@ -32,13 +34,13 @@ jobs:
             python-version: py35
             package: instrumentation
     steps:
-      - name: Checkout Contrib Repo at SHA - ${{ github.sha }}
+      - name: Checkout Contrib Repo @ SHA - ${{ github.sha }}
         uses: actions/checkout@v2
-      - name: Checkout Core Repo @ tag v0.15b0
+      - name: Checkout Core Repo @ SHA - ${{ env.CORE_REPO_SHA }}
         uses: actions/checkout@v2
         with:
           repository: open-telemetry/opentelemetry-python
-          ref: v0.15b0
+          ref: ${{ env.CORE_REPO_SHA }}
           path: opentelemetry-python-core
       - name: Set up Python ${{ env[matrix.python-version] }}
         uses: actions/setup-python@v2
@@ -62,13 +64,13 @@ jobs:
     name: ${{ matrix.tox-environment }}
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout Contrib Repo at SHA - ${{ github.sha }}
+      - name: Checkout Contrib Repo @ SHA - ${{ github.sha }}
         uses: actions/checkout@v2
-      - name: Checkout Core Repo @ tag v0.15b0
+      - name: Checkout Core Repo @ SHA ${{ env.CORE_REPO_SHA }}
         uses: actions/checkout@v2
         with:
           repository: open-telemetry/opentelemetry-python
-          ref: v0.15b0
+          ref: ${{ env.CORE_REPO_SHA }}
           path: opentelemetry-python-core
       - name: Set up Python 3.8
         uses: actions/setup-python@v2

README.md

@@ -63,7 +63,7 @@ Maintainers ([@open-telemetry/python-maintainers](https://github.com/orgs/open-t
 3. Activate your virtual env. `source my_test_venv/bin/activate`.
 4. Clone the [OpenTelemetry Python](https://github.com/open-telemetry/opentelemetry-python) Python Core repo to a folder named `opentelemetry-python-core`. `git clone git@github.com:open-telemetry/opentelemetry-python.git opentelemetry-python-core`.
 5. Change directory to the repo that was just cloned. `cd opentelemetry-python-core`.
-6. Move the head of this repo to the hash you want your tests to use. This is currently the tag `v0.15b0` as seen in `.github/workflows/test.yml`. Use `git fetch --tags && git checkout v0.15b0`.
+6. Move the head of this repo to the hash you want your tests to use. This is currently the SHA `47483865854c7adae7455f8441dab7f814f4ce2a` as seen in `.github/workflows/test.yml`. Use `git fetch && git checkout 47483865854c7adae7455f8441dab7f814f4ce2a`.
 7. Go back to the root directory. `cd ../`.
 8. Make sure you have `tox` installed. `pip install tox`.
 9. Run tests for a package. (e.g. `tox -e test-instrumentation-flask`.)