Revert "[CALCITE-3090] Use https for maven central"
Revert "[CALCITE-3090] Use https for maven central"

This reverts commit c96a9396e652e7bc1a71572b562e21ec3dc80c02.

looker-open-source/calcite-avatica,apache/calcite-avatica,apache/calcite-avatica,looker-open-source/calcite-avatica,looker-open-source/calcite-avatica,looker-open-source/calcite-avatica,apache/calcite-avatica,apache/calcite-avatica,apache/calcite-avatica,looker-open-source/calcite-avatica