Added total counter when querying policies, set 1000 as default limit for queries

Proposed changes

Added total counter when querying policies and set 1000 as default limit for queries. This should facilitate UI pagination and tracking policy numbers.

Relates to issues #191 and #197

Types of changes

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[ ] Bugfix (non-breaking change which fixes an issue)
[x] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

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[x] I have read the CONTRIBUTING doc
[x] I have signed the Contributor License Agreement
[x] I have updated the RELEASE NOTES
[x] I have added tests that prove my fix is effective or that my feature works
[ ] I have added necessary documentation (if appropriate)
[ ] Any dependent changes have been merged and published in downstream modules

Further comments

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orchestracities / anubis