CI: improvements

 -- no more -x option at compilation time
 -- iperf server report crash better handled
   -- python executor retrieve iperf server files in case of failure to analyze
   -- comparison w/ requested bandwidth
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/xml_files/enb_usrp210_band7.xml

@@ -27,7 +27,7 @@
 	<testCase id="010101">
 		<class>Build_eNB</class>
 		<desc>Build eNB (USRP)</desc>
-		<Build_eNB_args>-w USRP -x -c --eNB</Build_eNB_args>
+		<Build_eNB_args>-w USRP -c --eNB</Build_eNB_args>
 	</testCase>
 
 	<testCase id="030101">

ci-scripts/xml_files/test_case_list_template.xml

@@ -29,13 +29,13 @@
 	<testCase id="010101">
 		<class>Build_eNB</class>
 		<desc>Build eNB (USRP)</desc>
-		<Build_eNB_args>-w USRP -x -c --eNB</Build_eNB_args>
+		<Build_eNB_args>-w USRP -c --eNB</Build_eNB_args>
 	</testCase>
 
 	<testCase id="010102">
 		<class>Build_eNB</class>
 		<desc>Build eNB (USRP)</desc>
-		<Build_eNB_args>-w BLADERF -x -c --eNB</Build_eNB_args>
+		<Build_eNB_args>-w BLADERF -c --eNB</Build_eNB_args>
 	</testCase>
 
 	<testCase id="030101">