Generate Docs for Australis (#41)

Co-authored-by: Lawrence Wong <lawwong@paypal.com>

docs/australis_fetch_mesos_leader.md

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+## australis fetch mesos leader
+
+Fetch current Mesos-master leader given Zookeeper nodes.
+
+### Synopsis
+
+Gets the current leading Mesos-master instance using information from Zookeeper path.
+Pass Zookeeper nodes separated by a space as an argument to this command. If no nodes are provided, 
+it fetches leader from local Mesos agent or Zookeeper
+
+```
+australis fetch mesos leader [zkNode0, zkNode1, ...zkNodeN] [flags]
+```
+
+### Options
+
+```
+  -h, --help            help for leader
+      --zkPath string   Zookeeper node path where mesos leader election happens (default "/mesos")
+```
+
+### Options inherited from parent commands
+
+```
+  -a, --caCertsPath string      Path where CA certificates can be found.
+  -c, --clientCert string       Client certificate to use to connect to Aurora.
+  -k, --clientKey string        Client key to use to connect to Aurora.
+      --config string           Config file to use. (default "/etc/aurora/australis.yml")
+  -l, --logLevel string         Set logging level [panic fatal error warning info debug trace]. (default "info")
+  -p, --password string         Password to use for API authentication
+  -s, --scheduler_addr string   Aurora Scheduler's address.
+  -i, --skipCertVerification    Skip CA certificate hostname verification.
+  -t, --timeout duration        Gorealis timeout. (default 20s)
+      --toJSON                  Print output in JSON format.
+  -u, --username string         Username to use for API authentication
+  -z, --zookeeper string        Zookeeper node(s) where Aurora stores information. (comma separated list)
+```
+
+### SEE ALSO
+
+* [australis fetch mesos](australis_fetch_mesos.md)	 - Fetch information from Mesos.
+
+###### Auto generated by spf13/cobra on 8-Sep-2022