Make TestUnix more tolerant

This test checks a timestamp of account created in OpenDJ. However, the
resource rounds the time to whole seconds. For unknown reasons, it looks
like the safety margin of 1000 millis is not enough, so here it is
increased to 1500.

testing/story/src/test/java/com/evolveum/midpoint/testing/story/TestUnix.java

@@ -1983,9 +1983,72 @@ private String assertUnixGroup(PrismObject<ShadowType> shadow, Integer expectedG
         return entry.getDN().toString();
     }
 
+    /**
+     * Here is some OpenDJ weirdness that causes this test to fail.
+     *
+     * This is the account after test122:
+     *
+     *     2022-03-18 02:03:05,015 [TestUnix.test122AssignUserLargoBasic] DEBUG (c.evolveum.midpoint.test.IntegrationTestTools): *** Posix account entry
+     *     dn: uid=largo,ou=people,dc=example,dc=com
+     *     objectClass: person
+     *     objectClass: inetOrgPerson
+     *     objectClass: organizationalPerson
+     *     objectClass: top
+     *     objectClass: person
+     *     objectClass: inetOrgPerson
+     *     objectClass: organizationalPerson
+     *     objectClass: top
+     *     sn: LaGrande
+     *     cn: Largo LaGrande
+     *     givenName: Largo
+     *     uid: largo
+     *     ds-pwp-account-disabled: FALSE
+     *     createTimestamp: 20220318010304Z
+     *
+     * Note there is no modifyTimestamp. And the time is already after 02:03:05,000.
+     *
+     * Then there is a successful modification on 02:03:05,084:
+     *
+     *     2022-03-18 02:03:05,084 [TestUnix.test124AssignUserLargoUnix] DEBUG (c.evolveum.polygon.connector.ldap.OperationLog): method: null msg:ldap://localhost:10389/ Modify REQ uid=largo,ou=people,dc=example,dc=com: [add:homeDirectory=/home/largo,add:uidNumber=1002,add:objectClass=posixAccount,add:gidNumber=1002,], control=PermissiveModify
+     *     2022-03-18 02:03:05,085 [TestUnix.test124AssignUserLargoUnix] DEBUG (c.evolveum.polygon.connector.ldap.OperationLog): method: null msg:ldap://localhost:10389/ Modify RES uid=largo,ou=people,dc=example,dc=com:         Ldap Result (...) Result code : (SUCCESS) success (...)
+     *     2022-03-18 02:03:05,085 [TestUnix.test124AssignUserLargoUnix] DEBUG (c.e.polygon.connector.ldap.ConnectionLog): method: null msg:CONN ldap://localhost:10389/ modify success (uid=largo,ou=people,dc=example,dc=com)
+     *
+     * But the timestamp is still "010304":
+     *
+     *     2022-03-18 02:03:05,147 [TestUnix.test124AssignUserLargoUnix] DEBUG (c.evolveum.midpoint.test.IntegrationTestTools): *** Posix account entry
+     *     dn: uid=largo,ou=people,dc=example,dc=com
+     *     objectClass: top
+     *     objectClass: inetOrgPerson
+     *     objectClass: posixAccount
+     *     objectClass: organizationalPerson
+     *     objectClass: person
+     *     objectClass: top
+     *     objectClass: inetOrgPerson
+     *     objectClass: posixAccount
+     *     objectClass: organizationalPerson
+     *     objectClass: person
+     *     sn: LaGrande
+     *     cn: Largo LaGrande
+     *     givenName: Largo
+     *     homeDirectory: /home/largo
+     *     gidNumber: 1002
+     *     uidNumber: 1002
+     *     uid: largo
+     *     ds-pwp-account-disabled: FALSE
+     *     createTimestamp: 20220318010304Z
+     *     modifyTimestamp: 20220318010304Z
+     *
+     * Therefore we set the safety margin to a value greater than 1000 millis.
+     */
     protected void assertModifyTimestamp(PrismObject<ShadowType> shadow, long startTs, long endTs) throws Exception {
         Long actual = getTimestampAttribute(shadow);
-        TestUtil.assertBetween("Wrong modify timestamp attribute in " + shadow, startTs - 1000, endTs + 1000, actual);
+        // The timestamp is rounded to whole seconds, so let's have a safety margin here.
+        // For unknown reasons (see javadoc above), 1000 millis is sometimes too low. Let's be more generous.
+        long expectedFrom = startTs - 1500;
+        long expectedTo = endTs + 1500;
+        System.out.printf("Timestamp attribute: %,d, expected between %,d and %,d (startTs = %,d, endTs = %,d)%n",
+                actual, expectedFrom, expectedTo, startTs, endTs);
+        TestUtil.assertBetween("Wrong modify timestamp attribute in " + shadow, expectedFrom, expectedTo, actual);
     }
 
     protected Long getTimestampAttribute(PrismObject<ShadowType> shadow) throws Exception {