HDDS-7164. Skip installing awscli if already present (#3712)

diff --git a/hadoop-ozone/dist/src/main/smoketest/s3/commonawslib.robot b/hadoop-ozone/dist/src/main/smoketest/s3/commonawslib.robot
index 0b03f3c..74a3c95 100644
--- a/hadoop-ozone/dist/src/main/smoketest/s3/commonawslib.robot
+++ b/hadoop-ozone/dist/src/main/smoketest/s3/commonawslib.robot
@@ -42,6 +42,8 @@
     [return]          ${output}
 
 Install aws cli
+    ${rc}              ${output} =                 Run And Return Rc And Output           which aws
+    Return From Keyword If    '${rc}' == '0'
     ${rc}              ${output} =                 Run And Return Rc And Output           which apt-get
     Run Keyword if     '${rc}' == '0'              Install aws cli s3 debian
     ${rc}              ${output} =                 Run And Return Rc And Output           yum --help