Upgrade springboot.version from 2.0.5 to 2.1.5.

Upgrade springboot.version from 2.0.5 to 2.1.5.
Fixed APIHandler junit test cases with expected DB error messages.

Issue-ID: SO-2157
Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
Change-Id: I77ce873018b88268b9221226b95c9c106f93a8d0
diff --git a/asdc-controller/src/main/resources/application.yaml b/asdc-controller/src/main/resources/application.yaml
index beb40e5..2de5b69 100644
--- a/asdc-controller/src/main/resources/application.yaml
+++ b/asdc-controller/src/main/resources/application.yaml
@@ -18,6 +18,8 @@
         ddl-auto: validate
         naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy
         enable-lazy-load-no-trans: true
+  main:
+    allow-bean-definition-overriding: true
 
 request:
   datasource: