GUI branding support, GUI ssl (HTTPS) support, MTU checking, and OpenVPN bugfixes

1. Regression test passed.
2. GUI Branding: You can change the top-right icon to whatever you want
             (e.g. IBM, or SPEC, or whatever....)
3. GUI SSL: You can provide your own SSL key and certificate for encryption
4. MTU Checking: Some clouds networks have different MTU sizes (or broken MTUs
   in the case of misconfigured VLANs), preventing CB from operating correctly.
   This provides options to override the MTU inside the Guest so that it can
   be reachable.
5. Some bugfixes for OpenVPN support.
6. And some other bugfixes I probably forgot about.
This one doesn't exist upstream. Removing.
- Bugfixes for the VM creation code in OpenStack clouds (sometimes, the VM state
can suddenly flip from ACTIVE to ERROR, and the attachment should stop as soon
as we see the error).

- To better help with testing of the VM creation code in Cloud Adapters, a new
attribute in VM_DEFAULTS - called FORCE_FAILURE - can be used to cause the whole
VM creation to fail (inside the Cloud Adapter code) predictably.
Merge pull request #53 from bowers/master

Allow either Apache or CDH dfsadmin report format
Merge branch 'master' of github.com:ibmcb/cbtool
Merge pull request #51 from hinesmr/master

GUI branding support, GUI ssl (HTTPS) support, MTU checking, and OpenVPN bugfixes
Merge branch 'master' of github.com:ibmcb/cbtool
/ ‘docs/figures/cbtool_architecture.png’
/ ‘docs/figures/cbtool_overview_complex.png’
+ ‘docs/figures/cbtool_cloud_virtual_network_option1.png’
+ ‘docs/figures/cbtool_cloud_virtual_network_option2.png’
+ ‘docs/figures/cbtool_cloud_virtual_network_option3.png’
/ ‘docs/figures/cbtool_cloud_virtual_network_option3.png’
Bugfix for host discovery through the OpenStack cloud adapter.

Bugfix for OpenStack Cloud Adapters (sometime the access URL does
not contain two colons (:), and we should deal with it appropriately).

Code cleanup (including proper description) for ibm_daytrader VApp.
Merge branch 'master' of github.com:ibmcb/cbtool
Automatically add file SPEC_dependencies.txt on the installer file list.
Change hadoop/kmeans parameters, fix timeout in vCloud Director plugin