Stop using fixed path /tmp

Change-Id: If0d8048db555cd9872959aaa70d52cc3a9aa864b

@@ -14,7 +14,7 @@
   ~ limitations under the License.
   -->
 
-<scenario name="one" description="" logDir="/tmp/junit-stc/one">
+<scenario name="one" description="" logDir="${test.dir}/junit-stc/one">
     <step name="yolo" exec="some-command args"/>
     <step name="hello" exec="some-command other args" requires="yolo"/>
 </scenario>
\ No newline at end of file

@@ -13,7 +13,7 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<scenario name="foo" description="Simple Test Scenario" logDir="/tmp/junit-stc/foo">
+<scenario name="foo" description="Simple Test Scenario" logDir="${test.dir}/junit-stc/foo">
     <group name="alpha" exec="same-command args">
         <step name="one" exec="asdads"/>
         <step name="two" exec="asdads"/>

@@ -14,7 +14,7 @@
   ~ limitations under the License.
   -->
 
-<scenario name="two" description="" logDir="/tmp/junit-stc/two">
+<scenario name="two" description="" logDir="${test.dir}/junit-stc/two">
     <step name="dude" exec="some-command args"/>
     <step name="waz" exec="some-command other args"/>
     <step name="up" exec="another-command" requires="dude,waz"/>