Fix Bug 2309: VIM update issue

	- Fixed this bug by adding warning message for below scenarios
	  1st scenario : if the config is send empty from UI it'll show the error "Atleast one config information is required"
	  2nd scenario: config deleting is not allowed user can change the value to true or false based on his/her requirement for this action error message will be "Disallowed operation in config update".
	- Also for update load config and clear config button will be not available user can only edit his/her config.

Change-Id: Ib30aaa069f64ca3fcd1412591a4a69ae27098df2
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>