Update vic ci testbed number (#8638)

Moving out 1 vic ci testbed for other tests

Author: ading007

tests/resources/VCH-Util.robot

@@ -34,8 +34,8 @@ Set Test Environment Variables
 
     @{URLs}=  Split String  %{TEST_URL_ARRAY}
     #${len}=  Get Length  ${URLs}
-    # hardcode the TEST_URL_Array number as 3 since the other HAAS servers are taken for other usage
-    ${len}=  Set Variable if  %{DRONE_BUILD_NUMBER}  3  1
+    # hardcode the TEST_URL_Array number as 2 since the other HAAS servers are taken for other usage
+    ${len}=  Set Variable if  %{DRONE_BUILD_NUMBER}  2  1
     ${IDX}=  Evaluate  %{DRONE_BUILD_NUMBER} \% ${len}
 
     Run Keyword If  %{DRONE_BUILD_NUMBER}  Set Environment Variable  TEST_URL  @{URLs}[${IDX}]

tests/wait_until_previous_builds_complete.sh

@@ -15,8 +15,8 @@
 
 unit_test_array=($TEST_URL_ARRAY)
 numServers=${#unit_test_array[@]}
-#hardcode number as 3, since the other HAAS servers are taken for other usage
-numServers=3
+#hardcode number as 2, since the other HAAS servers are taken for other usage
+numServers=2
 DRONE_BUILD_NUMBER=${DRONE_BUILD_NUMBER:=0}
 prevBuildNumber=$(( $DRONE_BUILD_NUMBER-$numServers ))
 prevBuildStatus=`drone build info --format='{{.Status}}' vmware/vic $prevBuildNumber`