Improve smoke tests

plans/smoke.fmf

@@ -1,25 +1,41 @@
-summary: Basic smoke test - OpenJDK 8
 prepare:
   how: install
   exclude:
     - maven-openjdk8
     - maven-openjdk11
     - maven-openjdk17
+discover:
+  how: shell
+  tests:
+    - name: /smoke/ensure-single-jdk
+      test: "! rpm -qa | grep ^java- | grep -v ^java-${JDK_VERSION}-openjdk-"
+    - name: /smoke/show-version
+      test: mvn -v
+    - name: /smoke/dependency-get
+      test: rm -rf $HOME/.m2 && mvn -V dependency:get -Dartifact=junit:junit:4.12 && stat $HOME/.m2/repository/junit/junit/4.12/junit-4.12.jar
 execute:
-  script:
-    - mvn -V dependency:get -Dartifact=junit:junit:4.12 && stat $HOME/.m2/repository/junit/junit/4.12/junit-4.12.jar
+  how: tmt
 
 /jdk8:
+  summary: Basic smoke tests (OpenJDK 8)
+  environment:
+    JDK_VERSION: 1.8.0
   prepare+:
     exclude-:
       - maven-openjdk8
 
 /jdk11:
+  summary: Basic smoke tests (OpenJDK 11)
+  environment:
+    JDK_VERSION: 11
   prepare+:
     exclude-:
       - maven-openjdk11
 
 /jdk17:
+  summary: Basic smoke tests (OpenJDK 17)
+  environment:
+    JDK_VERSION: 17
   prepare+:
     exclude-:
       - maven-openjdk17