FIX: Solr indices will now paginate properly

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 94.82759% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 86.40%. Comparing base (f72fc0b) to head (9836c5a).

Files	Patch %	Lines
intake_esgf/core/solr.py	94.82%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #34 +/- ## ========================================== + Coverage 86.23% 86.40% +0.17% ========================================== Files 10 10 Lines 799 809 +10 ========================================== + Hits 689 699 +10 Misses 110 110 ``` | [Flag](https://app.codecov.io/gh/esgf2-us/intake-esgf/pull/34/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/esgf2-us/intake-esgf/pull/34/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us) | `86.40% <94.82%> (+0.17%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=esgf2-us#carryforward-flags-in-the-pull-request-comment) to find out more.

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