Upgrade Spring to 4.3.15-RELEASE

Upgrade to fix 3 security issues:

https://nvd.nist.gov/vuln/detail/CVE-2018-1270
https://nvd.nist.gov/vuln/detail/CVE-2016-9878
https://nvd.nist.gov/vuln/detail/CVE-2018-1271

Issue-ID: POLICY-722
Change-Id: Icfa5775905ad091dbe55eadfb4414c67abebc13a
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
diff --git a/ONAP-PAP-REST/pom.xml b/ONAP-PAP-REST/pom.xml
index 9956e9a..a648fe6 100644
--- a/ONAP-PAP-REST/pom.xml
+++ b/ONAP-PAP-REST/pom.xml
@@ -301,7 +301,7 @@
 		</dependency>
 	</dependencies>
 	<properties>
-		<springframework.version>4.3.3.RELEASE</springframework.version>
+		<springframework.version>4.3.15.RELEASE</springframework.version>
 		<hibernate.version>4.3.10.Final</hibernate.version>
 		<projectversion>2.0.2</projectversion>
 	</properties>