added yum repo support

manifests/repo/yum.pp

@@ -1,5 +1,18 @@
 # PRIVATE CLASS: do not use directly
-
 class influxdb::repo::yum {
 
-}
+  $_operatingsystem = $::operatingsystem ? {
+    'CentOS' => downcase($::operatingsystem),
+    default  => 'rhel',
+  }
+
+  yumrepo { 'repos.influxdata.com':
+    descr    => "InfluxDB Repository - ${::operatingsystem} \$releasever",
+    baseurl  => "https://repos.influxdata.com/${$_operatingsystem}/\$releasever/\$basearch/stable",
+    enabled  => 1,
+    gpgcheck => 1,
+    gpgkey   => 'https://repos.influxdata.com/influxdb.key',
+  }
+
+  Yumrepo['repos.influxdata.com'] -> Package<| tag == 'influxdb' |>
+}