fix use of conda in gitlab-ci

.gitlab-ci.yml

-image: registry.esss.lu.se/ics-docker/miniconda
+#image: registry.esss.lu.se/ics-docker/miniconda
+image: continuumio/miniconda3
 .pip_install_default: &pip_install_default
-    - pip install numpy scipy h5py matplotlib webdavclient3
-variables:
-  TWINE_REPOSITORY_URL: https://artifactory.esss.lu.se/artifactory/api/pypi/ics-pypi
+    - conda update --all
+    - conda install -c anaconda scipy
+    - conda install -c conda-forge matplotlib
+    - conda install -c conda-forge h5py
+    - pip install webdavclient3
+#variables:
+#  TWINE_REPOSITORY_URL: https://artifactory.esss.lu.se/artifactory/api/pypi/ics-pypi
 
 stages:
     - test