Reduce flakiness of one test which compares two documents

There are more places where a timestamp is stored in the zip-file, 
let's try to replace some more bytes to make comparison succeed
more often.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1912126 13f79535-47bb-0310-9956-ffa450edef68

poi/src/test/java/org/apache/poi/ss/usermodel/BaseTestBugzillaIssues.java

@@ -1840,6 +1840,41 @@ private byte[] removeTimestamp(byte[] bytes) {
             bytes[11] = 0;
             bytes[12] = 0;
             bytes[13] = 0;
+
+            // there is a timestamp for every entry, so try to replace a few more byte-positions
+            // to reduce flakiness of this test, however we likely do not yet cover all entries
+            bytes[390] = 0;
+            bytes[391] = 0;
+            bytes[674] = 0;
+            bytes[883] = 0;
+            bytes[1207] = 0;
+            bytes[1208] = 0;
+            bytes[1433] = 0;
+            bytes[1434] = 0;
+            bytes[1817] = 0;
+            bytes[1818] = 0;
+            bytes[2098] = 0;
+            bytes[2099] = 0;
+            bytes[2762] = 0;
+            bytes[2763] = 0;
+            bytes[2382] = 0;
+            bytes[2383] = 0;
+            bytes[2827] = 0;
+            bytes[2828] = 0;
+            bytes[2884] = 0;
+            bytes[2885] = 0;
+            bytes[2946] = 0;
+            bytes[2947] = 0;
+            bytes[3009] = 0;
+            bytes[3010] = 0;
+            bytes[3075] = 0;
+            bytes[3076] = 0;
+            bytes[3134] = 0;
+            bytes[3135] = 0;
+            bytes[3195] = 0;
+            bytes[3196] = 0;
+            bytes[3267] = 0;
+            bytes[3268] = 0;
         }
 
         return bytes;