Bug 945751:  Eliminate use of shared k/v store by signing

This removes the need for any persistent storage on the signing servers.
Added tag SIGNING_SERVER for changeset 426b20e6484e
Bug 957238 - Stop doing pattern matching on the version - r=nthomas
Added tag FENNEC_27_0b6_RELEASE, FENNEC_27_0b6_BUILD1, FIREFOX_27_0b6_RELEASE, FIREFOX_27_0b6_BUILD1 for changeset 2a09721cfdc2
Bug 864364 - Shut down KVM buildbot masters. r=Callek
Automated configuration bump: update configs for Firefox 27.0b6 build 1
Added tag FIREFOX_27_0b6_RELEASE_RUNTIME, FIREFOX_27_0b6_BUILD1_RUNTIME for changeset 125a79e081ab