Added functional CSIT tests for DFC

New test case for single file download and publish
Minor refactoring of Management interface test

Issue-ID: DCAEGEN2-1313
Change-Id: I2436db42a5884a7d828dbefcf9678aa9cdf064e3
Signed-off-by: BjornMagnussonXA <bjorn.magnusson@est.tech>
diff --git a/plans/dcaegen2-collectors-datafile/ManagementInterface-suite/teardown.sh b/plans/dcaegen2-collectors-datafile/ManagementInterface-suite/teardown.sh
index bb0ac92..97ef403 100644
--- a/plans/dcaegen2-collectors-datafile/ManagementInterface-suite/teardown.sh
+++ b/plans/dcaegen2-collectors-datafile/ManagementInterface-suite/teardown.sh
@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 
-kill-instance.sh dfc
\ No newline at end of file
+kill-instance.sh dfc_app
\ No newline at end of file