Upstream NetworkManager-openswan (which also includes libreswan support) has many, many fixes over the version currently shipping in RHEL7. The RHEL7 NetworkManager-libreswan package should be rebased to the upstream source and the various files changed/renamed to provide seamless upgrade.
There is https://brewweb.devel.redhat.com/buildinfo?buildID=454986 with NetworkManager-libreswan-1.0.6-1.el7, does it matter?
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.