Update java instructions now YCM has nice API for it

support/test/java/test_project/.vimspector.json

@@ -1,13 +1,7 @@
 {
-  "adapters": {
-    "java-debug-server": {
-      "name": "vscode-java",
-      "port": "ask"
-    }
-  },
   "configurations": {
     "Java Launch": {
-      "adapter": "java-debug-server",
+      "adapter": "vscode-java",
       "configuration": {
         "request": "launch",
         "mainClass": "com.vimspector.test.TestApplication",
@@ -18,6 +12,16 @@
         "console": "integratedTerminal"
       }
     },
+    "Java Attach": {
+      "adapter": "vscode-java",
+      "configuration": {
+        "request": "attach",
+        "sourcePaths": [ "${workspaceRoot}/src/main/java" ],
+        "stopOnEntry": true,
+        "hostName": "localhost",
+        "port": "${JVMDebugPort}"
+      }
+    },
     "Attach with vscode-javac": {
       "adapter": "vscode-javac",
       "configuration": {