Bump legacy test timeout to account for slow-running agents on CI

Author: mcculls

testsupport/nexus-test-harness-launcher/src/main/java/org/sonatype/nexus/integrationtests/AbstractNexusIntegrationTest.java

@@ -321,7 +321,7 @@ protected void startNexus() throws Exception {
 
       // booting is now asynchronous, so have to wait for Nexus
       Thread.sleep(10000);
-      for (int i = 0; i < 100; i++) {
+      for (int i = 0; i < 170; i++) {
         try {
           if (getNexusStatusUtil().isNexusRunning()) {
             return;