TT#17550 Fix 58a89e4a: removed unnecessary folder from sipp scenarios

sipwise-kamailio-config-tests-lnp failed:

> sipp: The following events occured:
> 2017-06-22    12:01:31.792835 1498125691.792835: SIPp now prefers looking for
> pcap files next to the scenario. scenarios_lnp/media181sec.pcap couldn't be
> found next to the scenario, falling back to using the current working directory.

Change-Id: I1a06b830a77c433e6ce0f22a338191a7f16d6dc8

scenarios_lnp/incoming_peer/sipp_scenario00.xml

@@ -59,7 +59,7 @@
   <pause milliseconds="500"/>
   <nop>
     <action>
-      <exec play_pcap_audio="scenarios_lnp/media181sec.pcap"/>
+      <exec play_pcap_audio="media181sec.pcap"/>
     </action>
   </nop>
 

scenarios_lnp/invite/sipp_scenario00.xml

@@ -109,7 +109,7 @@
   <pause milliseconds="500"/>
   <nop>
     <action>
-      <exec play_pcap_audio="scenarios_lnp/media181sec.pcap"/>
+      <exec play_pcap_audio="media181sec.pcap"/>
     </action>
   </nop>
 

scenarios_lnp/invite_peerout/sipp_scenario00.xml

@@ -109,7 +109,7 @@
   <pause milliseconds="500"/>
   <nop>
     <action>
-      <exec play_pcap_audio="scenarios_lnp/media181sec.pcap"/>
+      <exec play_pcap_audio="media181sec.pcap"/>
     </action>
   </nop>
 

scenarios_lnp/invite_peerout_rn/sipp_scenario00.xml

@@ -109,7 +109,7 @@
   <pause milliseconds="500"/>
   <nop>
     <action>
-      <exec play_pcap_audio="scenarios_lnp/media181sec.pcap"/>
+      <exec play_pcap_audio="media181sec.pcap"/>
     </action>
   </nop>
 

scenarios_pbx/incoming_shared_line/sipp_scenario02.xml

@@ -116,7 +116,7 @@
   <pause milliseconds="500"/>
   <nop>
     <action>
-      <exec play_pcap_audio="scenarios/media181sec.pcap"/>
+      <exec play_pcap_audio="media181sec.pcap"/>
     </action>
   </nop>