release 1.7.0

[evgeni]

this includes #285

changelog:

• Python 3 support
• Capability to preserve proxy settings when reconfiguring/migrating the client (#283)
• EL5 subscription manager compatibility fixes (#284)
• Only yum clean metadata and dbcache, not RPMs (#280)
• Allow defining where to get ssh keys and where to store them (#281)
• Make the FIPS check more robust (#279)
• Support yum and dnf Python bindings (#271)
• Option to ignore registration failures (#261)
• Force lowercase FQDN writing puppet configuration (#255)
• Improve the error message when a search fails (#257)

[sideangleside]

:+1: LGTM