[mifos/head] d971a6: Bump xstream from 1.3.1 to 1.4.17

[dependabot[bot] <no...@gi...>]

  Branch: refs/heads/dependabot/maven/com.thoughtworks.xstream-xstream-1.4.17
  Home:   https://github.com/mifos/head
  Commit: d971a6dae291bcc6969305f1017a7973cc907803
      https://github.com/mifos/head/commit/d971a6dae291bcc6969305f1017a7973cc907803
  Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
  Date:   2021-05-18 (Tue, 18 May 2021)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  Bump xstream from 1.3.1 to 1.4.17

Bumps [xstream](https://github.com/x-stream/xstream) from 1.3.1 to 1.4.17.
- [Release notes](https://github.com/x-stream/xstream/releases)
- [Commits](https://github.com/x-stream/xstream/commits)

Signed-off-by: dependabot[bot] <su...@gi...>