Update Conjur to consume semantic versioned release of Conjur Base Image

[izgeri]

In cyberark/conjur-base-image#42, we update the versioning strategy for the Conjur base images to move to a semantic versioning scheme (as is standard for most of our Conjur OSS components).

In this issue, we need to update the Dockerfiles for this project to use the new versioning scheme. In particular, once cyberark/conjur-base-image#42 is merged and the 1.0.0 tag is added to the Conjur Base Image project, we will need to update the following Dockerfiles to consume v1.0.0 of their base images:

• gems/policy-parser/Dockerfile.test
• dev/Dockerfile.dev
• Dockerfile
• Dockerfile.ubi