Port esx_software_update type/provider

[ggeldenhuis]

This work is intended for @crayfishx
The Dell module has implemented a esx_software_update type and provider. There is various commits that cover the functionality. This ticket serves as a generic place holder to do porting work.

Related PRs from the Dell module are:

• ASM-6570 Task : script in vcenter module to gather ESX software inventory dell-asm/vmware-vcenter#106
• ASM-6570: Use reliable method to get all VIBs, with more details dell-asm/vmware-vcenter#109
• ASM-6588: Apply the vib update on ESXi host dell-asm/vmware-vcenter#113
• ASM-7104 Raise error for software update if there were some or no VIBs failed to install dell-asm/vmware-vcenter#128
• ASM-6923 Software VIB updates logging dell-asm/vmware-vcenter#130