Change out-of-the-box config to work on dev's environment

Change out-of-the-box config to work on dev's environment

1) Fill-up system.properties's missing fields, and same for
   system_template.properties.

   This modifies some SO endpoints, most significantly --
   mso.restapi.vnf.instance is now
   /serviceInstantiation/v7/serviceInstances/<service_instance_id>/vnfs
   instead of
   /serviceInstances/v6/<service_instance_id>/vnfs

2) Configure endpoint's to a local simulator's location:
   * ecomp_rest_url in portal.properties
   * mso.server.url, aai.server.url in system.properties
   * asdc.client.rest.host in asdc.properties

3) Added always-on getSessionSlotCheckInterval in simulator.

Issue-ID: VID-564

Change-Id: Icc7bdc83ed65df3415a4b0f36f98291775909f49
Signed-off-by: Ittay Stern <ittay.stern@att.com>