Fixed slow conda environment creation.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
6 jobs for master in 54 minutes and 24 seconds (queued for 2 seconds)
Name Stage Failure
failed
test_enpt_enmapboxapp_install Test
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/builds/EnMAP/GFZ_Tools_EnMAP_BOX/enpt_enmapboxapp/enpt_enmapboxapp/__init__.py", line 28, in <module>
from .enpt_enmapboxapp import EnMAPBoxApplication
File "/builds/EnMAP/GFZ_Tools_EnMAP_BOX/enpt_enmapboxapp/enpt_enmapboxapp/enpt_enmapboxapp.py", line 31, in <module>
from enmapbox.gui.applications import EnMAPBoxApplication
ModuleNotFoundError: No module named 'enmapbox'
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
test_enpt_enmapboxapp Test
dumping object inventory... done
build succeeded, 1 warning.

The HTML pages are in _build/html.
make[1]: Leaving directory '/builds/EnMAP/GFZ_Tools_EnMAP_BOX/enpt_enmapboxapp/docs'
make[1]: *** [Makefile:20: html] Segmentation fault (core dumped)
make: *** [Makefile:97: docs] Error 2
Cleaning up file based variables
ERROR: Job failed: exit code 1