Fix failing powermock tests

The version of javassist coming from opendaylight is not working correctly
with powermock. Adding a test scoped dependency for a working version of
javassist.

Test classes added in this commit are not new, they were temporarily
removed as part of https://gerrit.onap.org/r/#/c/79046/

Change-Id: I193873c0d4abd7b11592a95bff9a6b07cf2d7191
Signed-off-by: Patrick Brady <patrick.brady@att.com>
Issue-ID: APPC-1277
diff --git a/appc-outbound/appc-network-inventory-client/provider/pom.xml b/appc-outbound/appc-network-inventory-client/provider/pom.xml
index 1d9f215..ab4e39f 100755
--- a/appc-outbound/appc-network-inventory-client/provider/pom.xml
+++ b/appc-outbound/appc-network-inventory-client/provider/pom.xml
@@ -3,7 +3,7 @@
   ============LICENSE_START=======================================================

   ONAP : APPC

   ================================================================================

-  Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.

+  Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.

   ================================================================================

   Copyright (C) 2017 Amdocs

   =============================================================================

@@ -86,6 +86,12 @@
             <scope>test</scope>

         </dependency>

         <dependency>

+            <groupId>org.javassist</groupId>

+            <artifactId>javassist</artifactId>

+            <version>3.22.0-GA</version>

+            <scope>test</scope>

+        </dependency>

+        <dependency>

             <groupId>org.onap.appc</groupId>

             <artifactId>appc-config-params-provider</artifactId>

             <version>${project.version}</version>