VMs is toolchains are not detected

A wrong/too early guard was preventing from actually processing the VM
installation.

Also explicit a test transitively requires Java 1.8 to run

Author: mickaelistria

org.eclipse.m2e.jdt.tests/projects/basicProjectWithDep/pom.xml

@@ -3,12 +3,17 @@
   <groupId>ewq</groupId>
   <artifactId>bugM2e2</artifactId>
   <version>0.0.1-SNAPSHOT</version>
-  
-    <dependencies>
-	<dependency>
-		<groupId>org.apache.logging.log4j</groupId>
-		<artifactId>log4j-core</artifactId>
-		<version>2.17.1</version>
-	</dependency>
-</dependencies>
+
+	<properties>
+		<maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.target>1.8</maven.compiler.target>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-core</artifactId>
+			<version>2.17.1</version>
+		</dependency>
+	</dependencies>
 </project>

org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/LookupJDKToolchainsJob.java

@@ -82,18 +82,16 @@ private void addToolchain(ToolchainModel toolchain) {
 					.noneMatch(install -> isSameCanonicalFile(candidate, install))) {
 					VMStandin workingCopy = new VMStandin(standardType, candidate.getAbsolutePath());
 					workingCopy.setInstallLocation(candidate);
-					if (workingCopy.getJavaVersion() != null) {
-						String name = candidate.getName();
-						int i = 1;
-						while (isDuplicateName(name)) {
-							name = candidate.getName() + '(' + i++ + ')';
-						}
-						workingCopy.setName(name);
-						IVMInstall newVM = workingCopy.convertToRealVM();
-						// next lines workaround https://github.com/eclipse-jdt/eclipse.jdt.debug/issues/248
-						if (!(newVM instanceof IVMInstall2 newVM2 && newVM2.getJavaVersion() != null)) {
-							standardType.disposeVMInstall(newVM.getId());
-						}
+					String name = candidate.getName();
+					int i = 1;
+					while (isDuplicateName(name)) {
+						name = candidate.getName() + '(' + i++ + ')';
+					}
+					workingCopy.setName(name);
+					IVMInstall newVM = workingCopy.convertToRealVM();
+					// next lines workaround https://github.com/eclipse-jdt/eclipse.jdt.debug/issues/248
+					if (!(newVM instanceof IVMInstall2 newVM2 && newVM2.getJavaVersion() != null)) {
+						standardType.disposeVMInstall(newVM.getId());
 					}
 				}
 			});