Add screen-n-cpu-1 to logstash

As for devstack patch Ia3843818014f7c6c7526ef3aa9676bbddb8a85ca if the
fake virt driver is used the n-cpu processes are named n-cpu-${i} where
i is 1 to NUMBER_FAKE_NOVA_COMPUTE.

Currently the name field is an exact match and we don't change
NUMBER_FAKE_NOVA_COMPUTE from its default value of 1. So in order to
start collecting n-cpu in large-ops again just add n-cpu-1.

Change-Id: I963675436d05fe9cd8bf5cc609130fe6e2b90a79

modules/openstack_project/files/logstash/jenkins-log-client.yaml

@@ -131,6 +131,10 @@ source-files:
     tags:
       - screen
       - oslofmt
+  - name: logs/screen-n-cpu-1.txt
+    tags:
+      - screen
+      - oslofmt
   - name: logs/screen-n-crt.txt
     tags:
       - screen