misc(test): increase test memory slightly (datahub-project#12439)

Author: david-leifker

metadata-io/src/test/java/io/datahubproject/test/search/SearchTestContainer.java

@@ -5,7 +5,7 @@
 
 public interface SearchTestContainer {
 
-  String SEARCH_JAVA_OPTS = "-Xms446m -Xmx446m -XX:MaxDirectMemorySize=368435456";
+  String SEARCH_JAVA_OPTS = "-Xms512m -Xmx512m -XX:MaxDirectMemorySize=368435456";
 
   Duration STARTUP_TIMEOUT = Duration.ofMinutes(5); // usually < 1min