IBM Serviceable Event Provider (SEP): Update configuration files

Add API.json parameters to update, update docs/API.md with REST API
information and add basic support on ginger.py and ginger.conf files.

Signed-off-by: Paulo Vital <pvital@linux.vnet.ibm.com>
IBM Serviceable Event Provider (SEP): Backend support

Add IBM Sep functionalities to backend.

Signed-off-by: Paulo Vital <pvital@linux.vnet.ibm.com>
IBM Serviceable Event Provider (SEP): Update build files

Update Makefiles and SPEC files.

Signed-off-by: Paulo Vital <pvital@linux.vnet.ibm.com>
UI: SEP(ESA) initial setup

From: Paulo Vital <pvital@linux.vnet.ibm.com>

V2 -> V3:
 * Roolback to V1 implementation to follow V6 of the back-end.
 * Rebase

v1 -> v2:
According to back-end GET API has changed, changing the UI for the
latest back-end code.
Move subscribe part to a dialogue

This patch support the SEP initial setup function
Function are described as follows:
1.Subscribe data when data in the form are complete and activate SEP
 function
2.Unsubscribe clears user's information and set the status to Disabled
3.If there is already subscription in server, change "Subscribe" button to
"Update"

Signed-off-by: Wen Wang <wenwang@linux.vnet.ibm.com>