Add regression test for rhbz#1981486

.fmf/version

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+1

gating.yaml

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+--- !Policy
+product_versions:
+  - fedora-*
+decision_contexts:
+  - bodhi_update_push_testing
+  - bodhi_update_push_stable
+rules:
+  - !PassingTestCaseRule {test_case_name: fedora-ci.koji-build.tier0.functional}

plans/forktest.fmf

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+summary: Basic smoke test
+prepare:
+  how: install
+  package: xmvn-minimal
+execute:
+  script: |
+    set -x
+    cd ./plans/forktest
+    javac -d target/test-classes ForkTest.java
+    xmvn -V -e -B -o surefire:test

plans/forktest/ForkTest.java

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+public class ForkTest {
+  public void testFork() {
+  }
+}

plans/forktest/pom.xml

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+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>test</groupId>
+  <artifactId>forktest</artifactId>
+  <version>1.0.0</version>
+  <build>
+    <plugins>
+      <plugin>
+	<artifactId>maven-surefire-plugin</artifactId>
+	<configuration>
+	  <forkCount>2</forkCount>
+	</configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>