use/bandwidth-usage.tree: Added $FIRST_EXECUTION test(1)

If it's the first time execution of the agent, do not collect network data
and exit without error.

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Klismann Smoger Mottin <ksm09@inf.ufpr.br>
Signed-off-by: Josiney de Souza <josineys@c3sl.ufpr.br>

scripts/collect/use/bandwidth-usage.tree

@@ -155,8 +155,8 @@ PREFIX="$(dirname $(readlink -f $0))"
 PROJECT=$PREFIX/../project/source.int
 
 # Verify if this is not an UCA Classmate, UCA Server nor Projector ProInfo. If
-# it is, do not collect network data and exit
-if test "$(bash $PROJECT)" != "0"; then
+# it is, or if it's the first execution, do not collect network data and exit
+if test "$(bash $PROJECT)" != "0" -o "${FIRST_EXECUTION}"; then
     exit 0
 fi