Update Maven version to 'mvn39' for J release.

Issue-ID: NONRTRIC-1016
Change-Id: I1fd58f4ade5870ec3563515241479a59660fe0f2
Signed-off-by: Raviteja Karumuri <raviteja.karumuri@est.tech>
diff --git a/jjb/nonrtric-plt-a1policymanagementservice/nonrtric-plt-a1policymanagementservice.yaml b/jjb/nonrtric-plt-a1policymanagementservice/nonrtric-plt-a1policymanagementservice.yaml
index 11d1414..f1f5876 100644
--- a/jjb/nonrtric-plt-a1policymanagementservice/nonrtric-plt-a1policymanagementservice.yaml
+++ b/jjb/nonrtric-plt-a1policymanagementservice/nonrtric-plt-a1policymanagementservice.yaml
@@ -33,6 +33,7 @@
           branch: i-release
       - j-release:
           branch: j-release
+          mvn-version: mvn39
 
 # nonrtric:a1policymanagementservice/
 # Maven artifacts for nonrtric-plt-a1policymanagementservice/
@@ -55,6 +56,7 @@
           branch: i-release
       - j-release:
           branch: j-release
+          mvn-version: mvn39
 
 - project:
     <<: *a1policymanagementservice_jdk_common