Ensure EXIT_CODE is set. Kill Galaxy for local testing

Also properly initialise $i and use POSIX syntax

.ci/first_startup.sh

@@ -1,15 +1,16 @@
-#!/bin/bash
+#!/bin/sh
 TRIES=120
 URL=http://localhost:8080
+EXIT_CODE=1
+i=0
 echo "Testing for correct startup:"
 bash run.sh --daemon && \
-while [[ $i -le $TRIES ]]
-do
-    curl "$URL" && EXIT_CODE=0 && break
-    sleep 1
-    EXIT_CODE=1
-    ((i = i + 1))
-done
+    while [ "$i" -le $TRIES ]; do
+        curl "$URL" && EXIT_CODE=0 && break
+        sleep 1
+        i=$((i + 1))
+    done
+kill -9 "$(cat paster.pid)"
 echo "exit code:$EXIT_CODE, showing startup log:"
 cat paster.log
 exit $EXIT_CODE