v0.20.1.3 daint upstream for icon-dsl (#884)

* v0.20.1.3 daint upstream for icon-dsl

* change upstream install path

* Update unit_test.py

* Update README.md

* Reverting unit_test.py

---------

Co-authored-by: juckerj <39263956+jonasjucker@users.noreply.github.com>

README.md

@@ -7,6 +7,7 @@ Spack is the package manager used by C2SM and MeteoSwiss to install and deploy s
 
 **Infos about c2sm-supported software and machines**
   * [spack-c2sm latest](https://C2SM.github.io/spack-c2sm/latest)
+  * [spack-c2sm v0.20.1.3](https://C2SM.github.io/spack-c2sm/v0.20.1.3)
   * [spack-c2sm v0.20.1.0](https://C2SM.github.io/spack-c2sm/v0.20.1.0)
   * [spack-c2sm v0.18.1.12](https://C2SM.github.io/spack-c2sm/v0.18.1.12)
   * [spack-c2sm v0.18.1.10](https://C2SM.github.io/spack-c2sm/v0.18.1.10)
@@ -30,7 +31,7 @@ With spack v0.18 we suggest local/individual spack instances and the use of spac
 
 A user clones the spack repo
 ```bash
-git clone --depth 1 --recurse-submodules --shallow-submodules -b v0.20.1.0 https://github.com/C2SM/spack-c2sm.git
+git clone --depth 1 --recurse-submodules --shallow-submodules -b v0.20.1.3 https://github.com/C2SM/spack-c2sm.git
 ```
 gets spack in the command line
 ```bash

sysconfigs/daint/upstreams.yaml

@@ -2,6 +2,6 @@ upstreams:
   base:
       install_tree: /project/g110/spack/upstream/daint_v0.20.1.0/base
   icon-dsl:
-      install_tree: /project/g110/spack/upstream/daint_v0.20.1.0/icon-dsl
+      install_tree: /project/g110/spack/upstream/daint_v0.20.1.3/icon-dsl
   icon-rttov:
       install_tree: /project/g110/spack/upstream/daint_v0.20.1.0/icon-rttov

upstreams/daint/icon-dsl/spack.yaml

@@ -37,4 +37,4 @@ spack:
   view: false
   config:
     install_tree:
-      root: /project/g110/spack/upstream/daint_v0.20.1.0/icon-dsl
+      root: /project/g110/spack/upstream/daint_v0.20.1.3/icon-dsl