public static IgnoredException addIgnoredException(final Class exceptionClass) {
    return addIgnoredException(exceptionClass.getName(), null);
  }
Log in all VMs, in both the test logger and the GemFire logger the ignored exception string to
prevent grep logs from complaining. The suspect string is used by the GrepLogs utility and so
can contain regular expression characters.

<p>
If you do not remove the ignored exception, it will be removed at the end of your test case
automatically.

@since GemFire 5.7bugfix
@param suspectString the exception string to expect
@return an IgnoredException instance for removal
geode-dunit/src/main/java/org/apache/geode/test/dunit/IgnoredException.java