1. unify install.xml location

2. in ri_data.py, fix an error on Raid instance construction
3. in ri_func_dep.py, use common function ri_data.Group.get_install_pkgs()
4. in ri_install.py, add logic to config install.xml location
5. rename test.py to ri_main.py
6. in ri_main.py, add logic to set config.xml location
7. in ri_main.py, modify the way to get parameters.

interface/ri_data.py

@@ -6,7 +6,7 @@ from xml.dom import minidom
 from xml.dom.ext import PrettyPrint
 
 # xml file names
-install_xml = '../xml/install.xml'
+install_xml = '/var/install/install.xml'
 config_xml  = '../xml/config.xml'
 
 def to_xml_attr(doc, node, cls, name):
@@ -218,7 +218,7 @@ class Raid:
                     else:
                         act_cmpts.append(ss[:ss.index('[')])
 
-                Raid(raid_dev, "yes", raid_level, raid_size, act_cmpts, spr_cmpts)
+                Raid(raid_dev, "yes", raid_level, act_cmpts, spr_cmpts)
 
     @staticmethod
     def add_component(node, l):