feat: changed physicalCores to numCores and extended unit test

Author: jmarkerink

core/src/main/java/de/bwaldvogel/mongo/backend/AbstractMongoBackend.java

@@ -223,12 +223,12 @@ private Document handleHostInfo() {
         response.append("system", new Document()
             .append("currentTime", Instant.now())
             .append("hostname", Utils.getHostName())
+            .append("numCores", Runtime.getRuntime().availableProcessors())
             .append("cpuArch", System.getProperty("os.arch"))
         );
         response.append("extra", new Document()
             .append("versionString", osName + " " + osVersion)
-            .append("kernelVersion", osVersion)
-            .append("physicalCores", Runtime.getRuntime().availableProcessors()));
+            .append("kernelVersion", osVersion));
         Utils.markOkay(response);
         return response;
     }

test-common/src/main/java/de/bwaldvogel/mongo/backend/AbstractBackendTest.java

@@ -6647,6 +6647,7 @@ void testHostInfo() {
         Document result = runCommand("hostInfo");
         assertThat(result.get("ok")).isEqualTo(1.0);
         assertThat(result).containsKeys("os", "system", "extra");
+        assertThat(result.get("system", Document.class)).containsKeys("currentTime", "hostname", "numCores", "cpuArch");
     }
 
     @Test