qa/suites/rados/perf: run on ubuntu only

This change is specific to nautilus since fio tests have been failing
on centos and rhel 7.8 due to dependency issues.

Signed-off-by: Neha Ojha <nojha@redhat.com>

diff --git a/qa/suites/rados/perf/distros/ubuntu_16.04.yaml b/qa/suites/rados/perf/distros/ubuntu_16.04.yaml
new file mode 120000 (symlink)
index 0000000..a92e406
--- /dev/null
+++ b/qa/suites/rados/perf/distros/ubuntu_16.04.yaml
@@ -0,0 +1 @@
+../../../../distros/supported-all-distro/ubuntu_16.04.yaml
\ No newline at end of file

diff --git a/qa/suites/rados/perf/distros/ubuntu_latest.yaml b/qa/suites/rados/perf/distros/ubuntu_latest.yaml
new file mode 120000 (symlink)
index 0000000..f4d73c1
--- /dev/null
+++ b/qa/suites/rados/perf/distros/ubuntu_latest.yaml
@@ -0,0 +1 @@
+../../../../distros/supported-all-distro/ubuntu_latest.yaml
\ No newline at end of file

diff --git a/qa/suites/rados/perf/supported-random-distro$ b/qa/suites/rados/perf/supported-random-distro$
deleted file mode 120000 (symlink)
index 7cef21e..0000000
--- a/qa/suites/rados/perf/supported-random-distro$
+++ /dev/null
@@ -1 +0,0 @@
-../basic/supported-random-distro$
\ No newline at end of file