Update: We were able to get this resolved with a VMware vRA support engineer. Needed to re-register assemblies into SQL DB in order for installer to un-register and upgrade them. Most likely occurred from mutliple install attempts that had failed for other reasons, but left these asemblies as already registered and the installation didn't like that. Ran following commands:
"C:\Program Files (x86)\VMware\vCAC\Server\Model Manager Data\RepoUtil.exe" Assembly-List
"C:\Program Files (x86)\VMware\vCAC\Server\Model Manager Data\RepoUtil.exe" model-sqlupdate -f DynamicOps.ManagementModel.dll -v -s vmmip-h4vrod01.lm.lmig.com -d vcac
/****** Script for SelectTopNRows command from SSMS ******/
SELECT TOP 1000 [Id]
,[FullyQualifiedName]
,[FileName]
,[Content]
FROM [vCAC].[DynamicOps.RepositoryModel].[Assemblies]
RepoUtil.exe Model-Install -f DynamicOps.ManagementModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "ManagementModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.AmazonWSModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "AmazonWSModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.UcsModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "UcsModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.ScvmmModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "ScvmmModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.VMWareModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "VMWareModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.VCNSModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "VCNSModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.WorkQueueModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "WorkQueueModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.OpenstackModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "OpenstackModelSecurityConfig.xml" -v
RepoUtil.exe Model-Install -f DynamicOps.ReportsModel.dll -s "vmmip-h4vrod01.lm.lmig.com" -d "vcac" -c "ReportsModelSecurityConfig.xml" -v
-v