Fixes deprecation warnings in tutorials 10, 11. Closes #574.

[dthuerck]

Summary

Closes #574.

Tutorials 10 and 11 displayed deprecation warnings related to drawing circuit and displaying models from Gurobipy.

Details and comments

1. Tutorial 10: Drawing circuit requires an explicit style argument. We use clifford here to keep the images consistent with previous versions of this tutorial.
2. Tutorial 11: gurobipy deprecated the Model.display(). A look into their documentation did not reveal a clear substitute - but export to an .lp file comes pretty close. Hence, we're using temporary .lp files to pretty-print Gurobi models.

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All committers have signed the CLA.

[dthuerck]

The failing checks are due to gurobipy and should be fixed by #573.

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[coveralls]

Pull Request Test Coverage Report for Build 7115332361

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.029%

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Totals
Change from base Build 7115317477:	0.0%
Covered Lines:	4511
Relevant Lines:	4849

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💛 - Coveralls

[Sofranac-Boro]

built the docs and ran the changed examples. All looks good to me @dthuerck

[woodsp-ibm]

LGTM too! Thx!

FYI if you Click the blue Details link of any job in list (you might need to show all checks), in the left pane towards the top is Summary. Click that and scroll down the page and you will see a number of artifacts - documentation.zip is the docs built by CI and in this case it just uses the tutorials as they are checked in since the goal of this check was to check the docs would build. Then there is a tutorials3.8.zip and tutorials3.11.zip. These checks run the tutorials ((under min and max Python versions supported) to check they run and the docs are built from them so this has all docs built and if tutorials are changed the place to check the output from CI.

I'll label this StableBackportPotential since the docs can be republished at any time (and this is done off the current stable branch so needs backporting) if the PR is just about fixing docs.

[Sofranac-Boro]

LGTM too! Thx!

FYI if you Click the blue Details link of any job in list (you might need to show all checks), in the left pane towards the top is Summary. Click that and scroll down the page and you will see a number of artifacts - documentation.zip is the docs built by CI and in this case it just uses the tutorials as they are checked in since the goal of this check was to check the docs would build. Then there is a tutorials3.8.zip and tutorials3.11.zip. These checks run the tutorials ((under min and max Python versions supported) to check they run and the docs are built from them so this has all docs built and if tutorials are changed the place to check the output from CI.

I'll label this StableBackportPotential since the docs can be republished at any time (and this is done off the current stable branch so needs backporting) if the PR is just about fixing docs.

good to know, thanks @woodsp-ibm !