Remove workaround for missing pivotal-cloudfoundry-client-reactor

[onobc]

The changes to repo.spring.io surfaced a missing dependency in io.pivotal:pivotal-cloudfoundry-client-reactor:jar:2.1.0.RELEASE.

Several repos have added the libs-milestone repo as a temporary workaround until pivotal-cf/pcf-java-client#11 is resolved.

This issue is to go back through the following list and remove the workaround:

• spring-attic/spring-cloud-deployer-cloudfoundry@5f54992
• spring-attic/spring-cloud-skipper@635d6fd
• spring-attic/spring-cloud-dataflow-ui@b49fc92
• 35ff0d7#diff-9c5fb3d1b7e3b0f54bc5c4182965c4fe1f9023d449017cece3005d3f90e8e4d8R426

[onobc]

This is now available on Maven Central @ https://repo1.maven.org/maven2/io/pivotal/pivotal-cloudfoundry-client-reactor/2.2.0.RELEASE/