Moderate: kexec-tools security, bug fix, and enhancement update (Oracle Linux 7)

[2.0.7-19.0.1.el7_1.2]
- kdumpctl: exclude default_hugepagesz setting from kdump kernel cmdline
(Sriharsha Yadagudde) [Orabug: 19134999]
- kdumpctl: verify if kernel support securelevel interface
(Sriharsha Yadagudde) [Orabug: 18905671]

[2.0.7-19.2]
- dracut-module-setup: Enhance kdump to support the bind mounted feature in Atomic
- Fix the warning if the target path is bind mount in Atomic
- Get the mount point correctly, if the device has several mount point
- kdump-lib: Add new function to judge the system is Atomic or not
- kdump-lib: Add the new function to enhance bind mounted judgement
- Remove duplicate slash in save path
- dracut-module-setup.sh: change the insecure use of /tmp/*9947* filenames

[2.0.7-19.1]
- sadump: Support more than 16TB physical memory space.