qa: restore file name

Changing it caused symbolic links to not resolve which broke the kcephfs
suite (and probably others).

Fixes: 0e3d45d3486d47ea50045fb2449199f7158effe3
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

diff --git a/qa/distros/supported/rhel_7.yaml b/qa/distros/supported/rhel_7.yaml
deleted file mode 120000 (symlink)
index 8e67cf2..0000000
--- a/qa/distros/supported/rhel_7.yaml
+++ /dev/null
@@ -1 +0,0 @@
-../all/rhel_7.yaml
\ No newline at end of file

diff --git a/qa/distros/supported/rhel_latest.yaml b/qa/distros/supported/rhel_latest.yaml
new file mode 120000 (symlink)
index 0000000..8e67cf2
--- /dev/null
+++ b/qa/distros/supported/rhel_latest.yaml
@@ -0,0 +1 @@
+../all/rhel_7.yaml
\ No newline at end of file