LU-9682 nodemap: delete nids range from nodemap correctly

LU-9682 nodemap: delete nids range from nodemap correctly

In function nodemap_del_range(), we should check if the current
nodemap has the specified range before delete it from global
range tree.
Also, test_10b is added to sanity-sec.sh to verify this patch.

Lustre-change: https://review.whamcloud.com/28922
Lustre-commit: 62ca9b823524ca44d3344b2555754890abc55a3b

Change-Id: Ibab79056509d14d52f99b1ebe3319c301dbe45d9
Test-Parameters: testlist=sanity-sec
Signed-off-by: Emoly Liu <emoly.liu@intel.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/29138
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>