Allow dot test runners from any dir

Currently the .*test files in the source tree root seem to assume you're
in that directory when you run them.  This change should work exactly
the same except for removing that restriction.

Change-Id: I9b037016490dd6d5b515cb2c3cad2f99ee40bb6d

.functests

@@ -1,11 +1,13 @@
 #!/bin/bash
 
-cd test/functional
+SRC_DIR=$(dirname $0)
+
+cd ${SRC_DIR}/test/functional
 nosetests --exe $@
 func1=$?
 cd -
 
-cd test/functionalnosetests
+cd ${SRC_DIR}/test/functionalnosetests
 nosetests --exe $@
 func2=$?
 cd -

.probetests

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-cd test/probe
+cd $(dirname $0)/test/probe
 nosetests --exe
 rvalue=$?
 cd -

.unittests

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-cd test/unit
+cd $(dirname $0)/test/unit 
 nosetests --exe --with-coverage --cover-package swift --cover-erase $@
 rvalue=$?
 rm -f .coverage