test: add nss softtoken integration test

tests/spread/integration/libnss3/Test.java

@@ -0,0 +1,23 @@
+import java.io.ByteArrayInputStream;
+import java.security.Security;
+import sun.security.pkcs11.SunPKCS11;
+
+public class Test {
+    public static void main(String[] args){
+        String config = "library=/usr/lib/x86_64-linux-gnu/nss/libsoftokn3.so" + "\n"
+            + "name=\"Soft Token\"\n"
+            + "slot=2\n"
+            + "attributes=compatibility\n"
+            + "allowSingleThreadedModules=true\n"
+            + "showInfo=true\n"
+            + "nssArgs=\"configdir='./conf' "
+                        + "certPrefix='' "
+                        + "keyPrefix='' "
+                        + "secmod='secmod.db' "
+                        + "flags='readOnly'\""
+            + "\n";
+
+        SunPKCS11 provider = new SunPKCS11(new ByteArrayInputStream(config.getBytes()));
+        Security.insertProviderAt(provider, 1);
+    }
+}

tests/spread/integration/libnss3/task.yaml

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+summary: Integration tests for libnss3
+
+environment:
+  SLICE/nss: "nss"
+
+execute: |
+  # Test core slice installation
+  echo "SLICE=${SLICE}"
+  rootfs="$(install-slices openjdk-8-jre-headless_security libnss3_${SLICE})"
+  sudo apt-get update 
+  sudo apt-get install -y openjdk-8-jdk-headless
+  javac Test.java
+  cp Test.class ${rootfs}/
+  cp -r conf ${rootfs}/
+  cd ${rootfs}
+
+  mkdir -p proc/self
+  for java in `find usr/lib/jvm -name java`; do
+      ln -sf /${java} proc/self/exe
+      chroot . ${java} -cp . Test
+  done