Add F31 containers to nodepool

...and deactivate that request for always having f29 images up because
these do not make much sense now.

Change-Id: I00c13d80a450e92d5c87c03be265bc4d00908652
diff --git a/files/nodepool/nodepool.yaml b/files/nodepool/nodepool.yaml
index 1959449..0aa60f9 100644
--- a/files/nodepool/nodepool.yaml
+++ b/files/nodepool/nodepool.yaml
@@ -12,8 +12,6 @@
 
 labels:
   - name: f29
-    min-ready: 4
-    max-ready: 4
 
   - name: f31
 
@@ -60,6 +58,9 @@
           - name: f29
             username: ci
             path: /containers/f29
+          - name: f31
+            username: ci
+            path: /containers/f31
       - name: ci-f29-potemkin06-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin06-vm.pub") | trim }}'
         max-servers: 1
@@ -67,6 +68,9 @@
           - name: f29
             username: ci
             path: /containers/f29
+          - name: f31
+            username: ci
+            path: /containers/f31
       - name: ci-f29-potemkin07-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin07-vm.pub") | trim }}'
         max-servers: 1
@@ -74,6 +78,9 @@
           - name: f29
             username: ci
             path: /containers/f29
+          - name: f31
+            username: ci
+            path: /containers/f31
       - name: ci-f29-potemkin08-vm.vesnicky.cesnet.cz
         host-key: '{{ lookup("file", "../ansible-cesnet-secrets/nodepool/ci-f29-potemkin08-vm.pub") | trim }}'
         max-servers: 1
@@ -81,3 +88,6 @@
           - name: f29
             username: ci
             path: /containers/f29
+          - name: f31
+            username: ci
+            path: /containers/f31