Feature/msp 12244/postgres pass the hash

[thelightcosine]

This PR adds a new sub-type of the Replayablehash called PostgresMD5. These are MD5 hashes specifically formatted in Postgres' style . They can be cracked like any other hash and can be replayed through Pass-the-Hash attacks

Verification Steps

• bundle install

rake spec

• rake spec
• VERIFY no failures

Post-merge Steps

Perform these steps prior to pushing to master or the build will be broke on master.

Version

• Edit lib/metasploit/credential/version.rb
• Remove PRERELEASE and its comment as PRERELEASE is not defined on master.

Gem build

• gem build *.gemspec
• VERIFY the gem has no '.pre' version suffix.

RSpec

• rake spec
• VERIFY version examples pass without failures

Commit & Push

• git commit -a
• git push origin master

Release

Complete these steps on DESTINATION

VERSION

Compatible changes

If your change are compatible with the previous branch's API, then increment PATCH.

Incompatible changes

If your changes are incompatible with the previous branch's API, then increment MINOR and reset PATCH to 0.

• Following the rules for semantic versioning 2.0, update MINOR and PATCH and commit the changes.

MRI Ruby

• rvm use ruby-2.1@metasploit-credential
• rm Gemfile.lock
• bundle install
• rake release

[coveralls]

Coverage increased (+0.08%) to 93.52% when pulling 61995f7 on feature/MSP-12244/postgres-pass-the-hash into 09eaae1 on master.

[coveralls]

Coverage decreased (-0.1%) to 93.35% when pulling 937ece3 on feature/MSP-12244/postgres-pass-the-hash into 09eaae1 on master.