Distribute requires to where they are needed

MSP-11124

Push requires down to the Msf::DBManager mixins that actually need them.
Fix indentation in Msf::DBManager

MSP-11124
Remove nesting in Msf::DBManager::ImportMsfXml

MSP-11124

Don't use nested modules to prevent Msf::DBManager::ImportMsfXml from
being the declaring location for Msf::DBManager.
Fix migration.rb loading

MSP-11124
ImportMsfXml -> Import::MsfXml

MSP-11124
Force Rex::OLE::Util to work on LITTLE_ENDIAN
Extract Msf::DBManager::Import::Qualys::Asset

MSP-11124
Extract Msf::DBManager::Import::Qualys::Asset shared examples

MSP-11124
Update ranking
Update reverse_tcp.rb

As I am using a exploit that does a check on the Server HTTP headers to identify the target I saw an error message that reads like this:

>The target server fingerprint "" does not match "(?-mix:(Jetty|JBoss))", use 'set FingerprintCheck false' to disable this check.

Then, while using a HTTP proxy to analyse the requests I am presented with an error that tells me to set another internal option to override a default behaviour. Although it should be pretty clear to everyone using the metasploit framework, I think it is more convenient if all error messages have the same format/way to present suggestions, in this case, presenting the full command the user needs to introduce in order to carry on with the execution of the exploit.
Use ARCH_CMD on Windows target
Clarify the description on HP perfd module

Introduced in #3992
Trivial grammar fixes
Changed a login failed to vprint instead of print

People often like to supress failed attempts. Note that this change may
or may not have any effect, given the status of #3995.

This module was introduced in PR #3947.
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Land #4011, module description cleanup
Land #3651, local Bluetooth exploit a @KoreLogic

This started life as #3653. I'll take this out of unstable as well,
since it got there on commit b10cbe4f
A couple OSVDB updates for recent modules
Fix misaligned bracket
Land #4013, OSVDB refs for a couple modules