[FixRM #8319] - Properly disable BLANK_PASSWORDS for ektron_cms400net

In module ektron_cms400net.rb, datastore option "BLANK_PASSWORDS" is
set to false by default, because according to the original author, a
blank password will result in account lockouts. Since the user should
never set "BLANK_PASSWORDS" to true, this option should never be
presented as an option (when issuing the "show options").

While fixing #8319, I also noticed another bug at line 108, where
res.code is used when res could be nil due to a timeout, so I ended
up fixing it, too.
Fix undefined method error

[FixRM #8350]
Fix undefined method error

[FixRM #8322]
Fix undefined method error

[FixRM #8349]
Fix undefined method error

[FixRM #8348]
Fix undefined method error

[FixRM #8347]
Fix undefined method error

[FixRM #8346]
Fix undefined method error

[FixRM #8343]
Fix undefined method error

[FixRM #8342]
Fix undefined method error

[FixRM #8341]
Fix undefined method error

[FixRM #8340]
Fix undefined method error

[FixRM #8339]
Fix undefined method error

[FixRM #8338]
[FixRM #8337]
Fix undefined method error

[FixRM #8336]
Fix undefined method error

[FixRM #8334]
[FixRM #8333]
Fix undefined method error

[FixRM #8332]
Fix undefined method error

[FixRM #8331]
Fix undefined method error

[FixRM #8330]
Fix undefined method error

[FixRM #8329]
Fix undefined method error

[FixRM #8328]