Remove old database files before starting new SCPF tests

Change-Id: I652ca1f28ffb0d345f329de9b4e609926c2e0e1c
diff --git a/TestON/JenkinsFile/dependencies/PerformanceFuncs.groovy b/TestON/JenkinsFile/dependencies/PerformanceFuncs.groovy
index 2c86f43..1623373 100644
--- a/TestON/JenkinsFile/dependencies/PerformanceFuncs.groovy
+++ b/TestON/JenkinsFile/dependencies/PerformanceFuncs.groovy
@@ -339,6 +339,11 @@
            "','\$BUILD_NUMBER', '\$ONOSBranch', " + affectedByOldFlow( isOldFlow, testName ) + "\$line);\""
 }
 
+def cleanupDatabaseFile( testName ){
+    // clean up the database file created under /tmp
+    return 'rm /tmp/' + SCPF[ testName ][ 'file' ]
+}
+
 def databasePart( testName, database_command ){
     // read the file from the machine and insert it to the database