CI: Make CI scripts executable, fix bug in call to create_dev_env

.ci/unit_tests.sh

 #!/usr/bin/env bash
 
-thisdir=$(cd $(dirname $0) & pwd)
+thisdir=$(cd $(dirname $0) && pwd)
 
 ${thisdir}/create_dev_env.sh ./test.env
 

.gitlab-ci.yml

@@ -11,7 +11,7 @@ stages:
     - tags
     - merge_requests
   script:
-    - bash ./.ci/unit_tests.sh
+    - ./.ci/unit_tests.sh
 
 
 test:3.11: