ci: fix parallel run CI job (#201)

* ci: added parallelism to tests + job level retries in CI

* ci: fix parallel run CI job

Author: porcellus

.circleci/setupAndTestWithFreeCore.sh

@@ -48,12 +48,15 @@ cd ../project/test/server/
 npm i -d --force
 npm i git+https://github.com:supertokens/supertokens-node.git#$2
 cd ../../test/server/
+echo "Kill servers using port 8082."
+lsof -i tcp:8082 | grep -m 1 node | awk '{printf $2}' | cut -c 1- | xargs -I {} kill -9 {} > /dev/null 2>&1
+echo "Start new test server."
 TEST_MODE=testing INSTALL_PATH=../../../supertokens-root NODE_PORT=8082 node . &
 pid=$!
 cd ../../
 
 if ! [[ -z "${CIRCLE_NODE_TOTAL}" ]]; then
-    SUPERTOKENS_CORE_TAG=$coreTag INSTALL_PATH=../supertokens-root multi="spec=- mocha-junit-reporter=/dev/null" mocha --reporter mocha-multi --no-config --require isomorphic-fetch --timeout 500000 $(npx mocha-split-tests -r ./runtime.log -t $CIRCLE_NODE_TOTAL -g $CIRCLE_NODE_INDEX -f 'test/*.test.js')
+    SUPERTOKENS_CORE_TAG=$coreTag INSTALL_PATH=../supertokens-root multi="spec=- mocha-junit-reporter=/dev/null" npx mocha --reporter mocha-multi --no-config --require isomorphic-fetch --timeout 500000 $(npx mocha-split-tests -r ./runtime.log -t $CIRCLE_NODE_TOTAL -g $CIRCLE_NODE_INDEX -f 'test/*.test.js')
 else
     SUPERTOKENS_CORE_TAG=$coreTag INSTALL_PATH=../supertokens-root npm test
 fi

package.json

@@ -37,7 +37,6 @@
   "scripts": {
     "check-circular-dependencies": "npx madge --circular --extensions js ./lib/build/",
     "test": "TEST_MODE=testing npx mocha --timeout 500000",
-    "test-ci": "multi=\"spec=- mocha-junit-reporter=/dev/null\" mocha --reporter mocha-multi --no-config --require isomorphic-fetch --timeout 500000 $(npx mocha-split-tests -r ./runtime.log -t 4 -g 0 -f 'test/*.test.js')",
     "build-check": "cd lib && npx tsc -p tsconfig.json --noEmit && cd ../test/ && npx tsc -p tsconfig.json --noEmit",
     "build": "cd lib && rm -rf build && npx tsc -p tsconfig.json && cd ../ && npm run pack && cd test && npx tsc -p tsconfig.json",
     "pretty": "cd lib && npx prettier --write --config .prettierrc \"ts/**/*.ts\" \"build/**/*.js\" \"../test/**/*.js\"",