Run CI on Intel, not AMD

.gitlab-ci.yml

-Python 2.7 AMD CPU:
+Python 2.7 Intel CPU:
   script:
   - py_version=2.7
-  - export PYOPENCL_TEST=amd:pu
+  - export PYOPENCL_TEST=int:pu
   - EXTRA_INSTALL="numpy mako"
   - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/build-and-test-py-project.sh
   - ". ./build-and-test-py-project.sh"
   tags:
   - python2.7
-  - amd-cl-cpu
+  - intel-cl-cpu
   except:
   - tags
 Python 2.7 POCL: