hotfix: null state on providers first use

[limwa]

Closes #1174.
This PR changes the order of providers so that session provider is loaded before profile, exams and lectures providers.

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

Merging #1182 (7b7bac4) into master (e2e949f) will not change coverage.
Report is 1 commits behind head on master.
The diff coverage is 0%.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1182   +/-   ##
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  Coverage      16%     16%           
======================================
  Files         229     229           
  Lines        6951    6951           
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  Hits         1086    1086           
  Misses       5865    5865           

[LuisDuarte1]

Force merged because it's kind of high priority