[SAK-39760] Allow role=math attribute for img tag for WIRIS formulas - Sakai

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Test Plan:
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Go to add content in a site with CKEditor

Click source and add the text

<img align="middle" alt="square root of 5555" class="Wirisformula" data-mathml="(some mathml)" role="math" src="/pluginwiris_engine/app/showimage?formula=bf57cf5ace9b1e530d7221ee512cb429" />

Save, it should save without errors and when editing again the source should be the same (still containing the role=math attribute.
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Go to add content in a site with CKEditor Click source and add the text <img align="middle" alt="square root of 5555" class="Wirisformula" data-mathml="(some mathml)" role="math" src="/pluginwiris_engine/app/showimage?formula=bf57cf5ace9b1e530d7221ee512cb429" /> Save, it should save without errors and when editing again the source should be the same (still containing the role=math attribute.
11 status:
Resolved

The WIRIS formula editor (www.wiris.net) inserts markup like

Antisamy objects to the role="math" attribute so you get the yellow popup warning.

We should allow this attribute in the high and low antisamy policy files by default.