ci-operator/templates/openshift: Drop --log-level=debug

This makes it easier for folks who are less familiar with the debug
logs to find the actual error message.  For folks who *do* need access
to the debug logs, we still have those in the recovered artifacts
since openshift/installer@06c5fd36 (openshift-install: log debug
output to file, 2018-11-15, openshift/installer#689).

Generated with:

  $ sed -i 's/--log-level.debug //' $(git grep -l -- '--log-level.debug')

ci-operator/templates/openshift/installer/cluster-launch-installer-e2e.yaml

@@ -360,7 +360,7 @@ objects:
             exit 1
         fi
 
-        /bin/openshift-install --dir=/tmp/artifacts/installer --log-level=debug create cluster &
+        /bin/openshift-install --dir=/tmp/artifacts/installer create cluster &
         wait "$!"
 
     # Performs cleanup of all created resources
@@ -452,7 +452,7 @@ objects:
 
           echo "Deprovisioning cluster ..."
           export AWS_SHARED_CREDENTIALS_FILE=/etc/openshift-installer/.awscred
-          openshift-install --dir /tmp/artifacts/installer --log-level debug destroy cluster
+          openshift-install --dir /tmp/artifacts/installer destroy cluster
         }
 
         trap 'teardown' EXIT

ci-operator/templates/openshift/installer/cluster-launch-installer-src.yaml

@@ -332,7 +332,7 @@ objects:
             exit 1
         fi
 
-        /bin/openshift-install --dir=/tmp/artifacts/installer --log-level=debug create cluster &
+        /bin/openshift-install --dir=/tmp/artifacts/installer create cluster &
         wait "$!"
 
     # Performs cleanup of all created resources
@@ -424,7 +424,7 @@ objects:
 
           echo "Deprovisioning cluster ..."
           export AWS_SHARED_CREDENTIALS_FILE=/etc/openshift-installer/.awscred
-          openshift-install --dir /tmp/artifacts/installer --log-level debug destroy cluster
+          openshift-install --dir /tmp/artifacts/installer destroy cluster
         }
 
         trap 'teardown' EXIT

ci-operator/templates/openshift/openshift-ansible/cluster-launch-e2e-40.yaml

@@ -329,7 +329,7 @@ objects:
         fi
         # Need to copy install-config.yml as it gets consumed.
         cp /tmp/artifacts/installer/install-config.yml /tmp/artifacts/installer/install-config-ansible.yml
-        /bin/openshift-install --dir=/tmp/artifacts/installer --log-level=debug create ignition-configs &
+        /bin/openshift-install --dir=/tmp/artifacts/installer create ignition-configs &
         wait "$!"
 
     # Runs an install