Revert "[ci] Set relative path to artifacts and cache"

This reverts commit f21fc8cc, which does not really corrects the problem observed by bob/bob.admin#107 (closed).

.gitlab-ci.yml

@@ -3,8 +3,7 @@
 
 # Definition of global variables (all stages)
 variables:
-  MINICONDA_DIR: "miniconda"
-  CONDA_ROOT: "${CI_PROJECT_DIR}/${MINICONDA_DIR}"
+  CONDA_ROOT: "${CI_PROJECT_DIR}/miniconda"
 
 
 # Definition of our build pipeline order
@@ -30,8 +29,8 @@ stages:
   cache: &build_caches
     paths:
       - miniconda.sh
-      - ${MINICONDA_DIR}/pkgs/*.tar.bz2
-      - ${MINICONDA_DIR}/pkgs/urls.txt
+      - ${CONDA_ROOT}/pkgs/*.tar.bz2
+      - ${CONDA_ROOT}/pkgs/urls.txt
 
 
 .build_linux_template: &linux_build_job
@@ -43,7 +42,7 @@ stages:
     expire_in: 1 week
     paths:
       - _ci/
-      - ${MINICONDA_DIR}/conda-bld/linux-64/*.tar.bz2
+      - ${CONDA_ROOT}/conda-bld/linux-64/*.tar.bz2
   cache:
     <<: *build_caches
     key: "linux-cache"
@@ -57,7 +56,7 @@ stages:
     expire_in: 1 week
     paths:
       - _ci/
-      - ${MINICONDA_DIR}/conda-bld/osx-64/*.tar.bz2
+      - ${CONDA_ROOT}/conda-bld/osx-64/*.tar.bz2
   cache:
     <<: *build_caches
     key: "macosx-cache"
@@ -74,7 +73,7 @@ build_linux_36:
       - _ci/
       - dist/*.zip
       - sphinx
-      - ${MINICONDA_DIR}/conda-bld/linux-64/*.tar.bz2
+      - ${CONDA_ROOT}/conda-bld/linux-64/*.tar.bz2
 
 
 build_macosx_36: