Install enmapbox in developer mode.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

.gitlab-ci.yml

@@ -86,7 +86,7 @@ test_enpt_enmapboxapp_install:
     - git clone -b master https://bitbucket.org/hu-geomatics/enmap-box.git
     - pip install -r https://bitbucket.org/hu-geomatics/enmap-box/raw/master/requirements.txt ; \  # should all be there
     - cd enmap-box
-    - pip install .
+    - pip install -e .
     - cd ../enpt_enmapboxapp
 
     # install enpt_enmapboxapp