[CALCITE-1248] Add instructions to set user.name and how to clean up failed builds
[CALCITE-1248] Add instructions to set user.name and how to clean up failed builds

joshelser/calcite-avatica,b-slim/calcite,joshelser/calcite-avatica,minji-kim/calcite,jcamachor/calcite,looker-open-source/calcite-avatica,googleinterns/calcite,arina-ielchiieva/calcite,vlsi/calcite,looker-open-source/calcite-avatica,apache/calcite-avatica,yeongwei/incubator-calcite,dindin5258/calcite,sreev/incubator-calcite,yeongwei/incubator-calcite,vlsi/calcite,dindin5258/calcite,minji-kim/calcite,dindin5258/calcite,looker-open-source/calcite,joshelser/calcite-avatica,apache/calcite,apache/calcite,vlsi/incubator-calcite,minji-kim/calcite,datametica/calcite,datametica/calcite,sreev/incubator-calcite,yeongwei/incubator-calcite,xhoong/incubator-calcite,looker-open-source/calcite,googleinterns/calcite,arina-ielchiieva/calcite,vlsi/calcite,xhoong/incubator-calcite,sreev/incubator-calcite,julianhyde/calcite,b-slim/calcite,xhoong/incubator-calcite,b-slim/calcite,datametica/calcite,jcamachor/calcite,dindin5258/calcite,apache/calcite-avatica,looker-open-source/calcite-avatica,jcamachor/calcite,apache/calcite,julianhyde/calcite,googleinterns/calcite,yeongwei/incubator-calcite,googleinterns/calcite,julianhyde/calcite,looker-open-source/calcite,apache/calcite-avatica,looker-open-source/calcite,sreev/incubator-calcite,looker-open-source/calcite-avatica,vlsi/incubator-calcite,apache/calcite,xhoong/incubator-calcite,vlsi/calcite,googleinterns/calcite,julianhyde/calcite,vlsi/calcite,apache/calcite-avatica,b-slim/calcite,jcamachor/calcite,minji-kim/calcite,apache/calcite-avatica,looker-open-source/calcite,jcamachor/calcite,apache/calcite,apache/calcite,julianhyde/calcite,julianhyde/calcite,datametica/calcite,dindin5258/calcite,datametica/calcite,vlsi/calcite,arina-ielchiieva/calcite,googleinterns/calcite,looker-open-source/calcite,b-slim/calcite,arina-ielchiieva/calcite,minji-kim/calcite,datametica/calcite,jcamachor/calcite,looker-open-source/calcite-avatica,arina-ielchiieva/calcite,dindin5258/calcite