qa/cephfs: don't test kclient on RHEL 7

https://tracker.ceph.com/issues/43539
Signed-off-by: Rishabh Dave <ridave@redhat.com>

diff --git a/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_7.yaml b/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_7.yaml
deleted file mode 120000 (symlink)
index b776cd2..0000000
--- a/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_7.yaml
+++ /dev/null
@@ -1 +0,0 @@
-.qa/distros/all/rhel_7.yaml
\ No newline at end of file

diff --git a/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_8.yaml b/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_8.yaml
new file mode 120000 (symlink)
index 0000000..133acf2
--- /dev/null
+++ b/qa/cephfs/mount/kclient/overrides/distro/rhel/rhel_8.yaml
@@ -0,0 +1 @@
+.qa/distros/all/rhel_8.yaml
\ No newline at end of file