Remove unnecessary grep and tr from some tests

Change-Id: I1cd911ee35614f1726dd95abe6a5b1923a8b772c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/robot-systest/testsuite/basic_31-multivdu_volume_multiattach.robot b/robot-systest/testsuite/basic_31-multivdu_volume_multiattach.robot
index f8fe60f..ea7deae 100644
--- a/robot-systest/testsuite/basic_31-multivdu_volume_multiattach.robot
+++ b/robot-systest/testsuite/basic_31-multivdu_volume_multiattach.robot
@@ -81,8 +81,8 @@
 
 Get Vnf Management Ip Addresses
 
-    ${rc}   ${vdu0_ip}=   Run and Return RC and Output   osm vnf-show ${vnf_id} --literal | yq '.vdur[0].interfaces[]."ip-address"' | tr -d \\"
-    ${rc}   ${vdu1_ip}=   Run and Return RC and Output   osm vnf-show ${vnf_id} --literal | yq '.vdur[1].interfaces[]."ip-address"' | tr -d \\"
+    ${rc}   ${vdu0_ip}=   Run and Return RC and Output   osm vnf-show ${vnf_id} --literal | yq -r '.vdur[0].interfaces[]."ip-address"'
+    ${rc}   ${vdu1_ip}=   Run and Return RC and Output   osm vnf-show ${vnf_id} --literal | yq -r '.vdur[1].interfaces[]."ip-address"'
     Set Suite Variable   ${mgmnt_ip_addr_0}   ${vdu0_ip}
     Set Suite Variable   ${mgmnt_ip_addr_1}   ${vdu1_ip}