fix: use unique logfile names (#1711)

Fixes: #1681

Author: fhinkel

.kokoro/build-with-appengine.sh

@@ -19,7 +19,7 @@ set -e;
 export GCLOUD_PROJECT=nodejs-docs-samples-tests
 
 # Activate mocha config
-export MOCHA_REPORTER_OUTPUT=sponge_log.xml
+export MOCHA_REPORTER_OUTPUT=${PROJECT}_sponge_log.xml
 export MOCHA_REPORTER=xunit
 pushd github/nodejs-docs-samples
 mv .kokoro/.mocharc.js .

.kokoro/build-with-run.sh

@@ -17,7 +17,7 @@
 set -eo pipefail
 
 # Activate mocha config
-export MOCHA_REPORTER_OUTPUT=sponge_log.xml
+export MOCHA_REPORTER_OUTPUT=${PROJECT}_sponge_log.xml
 export MOCHA_REPORTER=xunit
 pushd github/nodejs-docs-samples
 mv .kokoro/.mocharc.js .

.kokoro/build.sh

@@ -72,7 +72,7 @@ export BOT_ACCESS_TOKEN=${KOKORO_GFILE_DIR}/secrets-slack-bot-access-token.txt
 export CHANNEL=${KOKORO_GFILE_DIR}/secrets-slack-channel-id.txt
 
 # Activate mocha config
-export MOCHA_REPORTER_OUTPUT=sponge_log.xml
+export MOCHA_REPORTER_OUTPUT=${PROJECT}_sponge_log.xml
 export MOCHA_REPORTER=xunit
 pushd github/nodejs-docs-samples
 mv .kokoro/.mocharc.js .