fix supprot package installation

do not add "etcd" into supoort packages

Change-Id: I61e4bc1dfd418d8990b7a15bac883ea1e9055ea9
diff --git a/etcd/server/service.sls b/etcd/server/service.sls
index 5fb8dc7..8d6a327 100644
--- a/etcd/server/service.sls
+++ b/etcd/server/service.sls
@@ -36,7 +36,9 @@
 
 {%- set _support_pkgs = [] %}
 {%- for pkg in server.pkgs %}
+{%- if pkg != 'etcd' %}
 {%- do _support_pkgs.append(pkg) %}
+{%- endif %}
 {%- endfor %}
 
 {%- if _support_pkgs|length > 1 %}