$expand not work if $levels is specified

when $levels is specified, $expand at same level is not working:
$expand=Children($levels=max;$expand=CodingBlockEntries)

[wog48]

Working on a fix, I noticed that the combination of $level together with an additional $expand not supported correctly by Olingo. I have created the following issue OLINGO-1608. The final solution of this issue requires the fix of OLINGO-1608.

[wog48]

Necessary preparation to solve this problem have been included in version 2.0.2. For further progress, a solution of OLINGO-1608 is required. In case there will be still a problem, after OLINGO-1608 was solved, reopen this issue.