Revert OpenCV version change

[ashokkumarkannan1]

Fix: #703

Previously CI was blocked with ImportError: ERROR: recursion is detected during loading of "cv2" binary extensions. Check OpenCV installation. issue. As per the suggestion here, downgraded the opencv-python-headless version from 4.6.0.66 to 4.5.5.64 in this PR.

Now this was blocking the MNIST Model with this issue. Hence reverting this change to see whether it still affect the CI.

[nvukobratTT]

@gfengTT @ashokkumarkannan1 can we try to use some newer version of OpenCV that doesn't hit this issue?

This more seems like bug in one of their version, so let's just test out newer one and see will that fix the issue, rather than downgrading it back again :))

Note: Here is an example of a similar failure. I'm not sure if it's the same issues, but let's try to keep our libraries on newer versions, rather than downgrading them.

[ashokkumarkannan1]

@gfengTT @ashokkumarkannan1 can we try to use some newer version of OpenCV that doesn't hit this issue?

This more seems like bug in one of their version, so let's just test out newer one and see will that fix the issue, rather than downgrading it back again :))

Note: Here is an example of a similar failure. I'm not sure if it's the same issues, but let's try to keep our libraries on newer versions, rather than downgrading them.

I agree with your point @nvukobratTT . From this Release History page, it seems 4.10.0.84 is the latest stable version. I will update this change here in this PR to verify is there any CI failures here.

@gfengTT Can you please confirm from your side whether 4.10.0.84 version works from your side?

[gfengTT]

Great suggestion @nvukobratTT .

@ashokkumarkannan1 Confirming 4.10.0.84 works.