API for updating and checking scm data

API for importing and checking data of scm/meta/git.
Adding scm_update and scm_check permission for user to accesss the API.
The API will rerutn JSON.

Change-Id: Icb9aaf518e9594096f628f3f3b4c960bdc4f34fc
Signed-off-by: gaoxuesx <xuesongx.gao@intel.com>
Add loop control continue statement

Change-Id: I97f7f053d35d14e09b28a422c283a7bee12ce1a2
Signed-off-by: gaoxuesx <xuesongx.gao@intel.com>