Adding solr tests to precommit checks (#52)

* Adding solr core and solrj tests to precommit checks

* Updating to run tests as separate step

* Fixing solr test name

* Adding submodule checkout

* Running all tests

* Running all tests

.github/workflows/solr-test.yml

@@ -0,0 +1,38 @@
+name: Solr Tests
+
+on:
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  test:
+    name: Run Solr Tests
+
+    runs-on: ubuntu-latest
+
+    steps:
+    # Setup
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - name: Set up JDK 11
+      uses: actions/setup-java@v2
+      with:
+        distribution: 'temurin'
+        java-version: 11
+        java-package: jdk
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-solrj-${{ hashFiles('versions.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-solrj-
+          ${{ runner.os }}-gradle-
+    - name: Initialize gradle settings
+      run: ./gradlew localSettings
+    - name: Test Solr
+      run: ./gradlew test