The following github links helped in fixing the issue up, all I had to do was to upgrade the powermock-api version to 2.0.0-beta.5 to make it work properly with mockito2.
https://github.com/mockito/mockito/issues/1207
https://github.com/powermock/powermock/wiki/Mockito#introduction
https://github.com/mockito/mockito/issues/292
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-core</artifactId>
<version>2.0.0-RC.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>2.0.0-beta.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito2</artifactId>
<version>2.0.0-beta.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.9</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-inline</artifactId>
<version>2.15.0</version>
</dependency>