Correctly distinguish between Dell and Juniper devices

Unfortunately there's not much info we can get from the Dell iDrac
HTML page as it's ridden with JavaScript.
No need to add the server family explicitly
get pxe - minor changes
get pxe - authentication is not necessary
Properly update device's rack and dc on cache update
get pxe - better exceptions catching
Rename ActiveTab() function to CMDBActiveTab() in main.js file
Show core counts graphs in the venture info
Fix wrong order of columns in the export devices to csv
move deployment classes and functions into separated file
mass deploy - specify the CSV content in first step is not required now
mass deploy - management ip - could be non unique in the same CSV
mass deploy - management ip - could be non unique in the same CSV (step 2)
Report Devices prices per Venture
Merge branch 'master' of git://github.com/allegro/ralph into reports

Conflicts:
	src/ralph/ui/views/reports.py
Merge pull request #372 from deshipu/master

Show core counts graphs and properly update device's rack and dc on cache update
Merge branch 'master' of git://github.com/allegro/ralph into reports

Conflicts:
	src/ralph/ui/views/reports.py
Merge branch 'master' of git://github.com/allegro/ralph into reports
Merge pull request #370 from quamilek/dev2

Fix wrong order of columns header in the export devices to csv
Missing semicolon added