Rename and simplify integration test job

Rename the integration test job to `IntTests` now that we do not run the
full matrix of unit tests in this job. Simplify the yaml by removing the
strategy section since we only use a single toolchain in this job.

Author: tcharding

.github/workflows/rust.yml

@@ -71,21 +71,17 @@ jobs:
           DO_FEATURE_MATRIX: true
         run: ./contrib/test.sh
 
-  AllTests:
-    name: Unit + Int tests
+  IntTests:
+    name: Integration tests
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        rust:
-          - stable
     steps:
       - name: Checkout Crate
         uses: actions/checkout@v2
       - name: Checkout Toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: ${{ matrix.rust }}
+          toolchain: stable
           override: true
       - name: Running cargo
         env: