8238263: Create at-requires mechanism for containers

Reviewed-by: bobv, iignatyev

Author: Harold Seigel

test/hotspot/jtreg/TEST.ROOT

@@ -75,7 +75,8 @@ requires.properties= \
     vm.compiler2.enabled \
     vm.musl \
     docker.support \
-    test.vm.gc.nvdimm
+    test.vm.gc.nvdimm \
+    jdk.containerized
 
 # Minimum jtreg version
 requiredVersion=5.1 b1

test/jdk/TEST.ROOT

@@ -58,7 +58,8 @@ requires.properties= \
     vm.hasJFR \
     vm.jvmci \
     docker.support \
-    release.implementor
+    release.implementor \
+    jdk.containerized
 
 # Minimum jtreg version
 requiredVersion=5.1 b1

test/jtreg-ext/requires/VMProps.java

@@ -118,6 +118,7 @@ public Map<String, String> call() {
         map.put("vm.musl", this::isMusl);
         map.put("release.implementor", this::implementor);
         map.put("test.vm.gc.nvdimm", this::isNvdimmTestEnabled);
+        map.put("jdk.containerized", this::jdkContainerized);
         vmGC(map); // vm.gc.X = true/false
         vmOptFinalFlags(map);
 
@@ -545,6 +546,11 @@ private String isNvdimmTestEnabled() {
         return "" + "true".equalsIgnoreCase(isEnabled);
     }
 
+    private String jdkContainerized() {
+        String isEnabled = System.getenv("TEST_JDK_CONTAINERIZED");
+        return "" + "true".equalsIgnoreCase(isEnabled);
+    }
+
     /**
      * Dumps the map to the file if the file name is given as the property.
      * This functionality could be helpful to know context in the real