etcd_log_package_levels for /etc/etcd.env (#3700)

roles/etcd/templates/etcd.env.j2

@@ -20,6 +20,9 @@ ETCD_SNAPSHOT_COUNT={{ etcd_snapshot_count }}
 {% if etcd_quota_backend_bytes is defined %}
 ETCD_QUOTA_BACKEND_BYTES={{ etcd_quota_backend_bytes }}
 {% endif %}
+{% if etcd_log_package_levels is defined %}
+ETCD_LOG_PACKAGE_LEVELS={{ etcd_log_package_levels }}
+{% endif %}
 
 # TLS settings
 ETCD_TRUSTED_CA_FILE={{ etcd_cert_dir }}/ca.pem