Having same issue here with my fresh install (failed upgrade 5.1 to 6U2). Mine appears to be related to the nimble and netapp plugins I have installed.
016-05-17T12:21:04.854-04:00 [pool-3-thread-4 INFO com.vmware.sca.vlsi.util.AuthParser] parseSamlData: No SSO token found in request
2016-05-17T12:21:04.871-04:00 [pool-3-thread-3 INFO com.vmware.identity.token.impl.SamlTokenImpl] SAML token for SubjectNameId [value=vpxd-3f1bc050-1b91-11e6-b3e2-000c2962ddaa@vsphere.local, format=http://schemas.xmlsoap.org/claims/UPN] successfully parsed from Element
2016-05-17T12:21:04.874-04:00 [pool-3-thread-3 INFO com.vmware.sca.vlsi.util.AuthParser] parseSamlData: Successfully authenticated 'vpxd-3f1bc050-1b91-11e6-b3e2-000c2962ddaa@vsphere.local' on session 4d8ee872-ffc0-47d3-a446-a2aab7c6a35a
2016-05-17T12:21:04.874-04:00 [pool-5-thread-25 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for vsphere-client
2016-05-17T12:21:04.874-04:00 [pool-5-thread-6 ERROR com.vmware.sca.servicecontrol.handlers.ScriptControlHandler] Failed to locate script; name: dummy_path, dirs: [C:\Program Files\VMware\vCenter Server\sca\scripts, C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts], [java.lang.Exception: Script doesn't exist; path: C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts\dummy_path]
2016-05-17T12:21:04.874-04:00 [pool-5-thread-6 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.nimblestorage.hi.7587853624680939864
2016-05-17T12:21:04.875-04:00 [pool-5-thread-6 WARN com.vmware.sca.health.HealthStatusRequest] getHealth: Could not find health status endpoint or file for serviceId: 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.nimblestorage.hi.7587853624680939864 healthStatusString: null endpointUrl :(null)
2016-05-17T12:21:04.875-04:00 [pool-5-thread-10 ERROR com.vmware.sca.servicecontrol.handlers.ScriptControlHandler] Failed to locate script; name: dummy_path, dirs: [C:\Program Files\VMware\vCenter Server\sca\scripts, C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts], [java.lang.Exception: Script doesn't exist; path: C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts\dummy_path]
2016-05-17T12:21:04.875-04:00 [pool-5-thread-10 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.nimblestorage.hi
2016-05-17T12:21:04.875-04:00 [pool-5-thread-10 WARN com.vmware.sca.health.HealthStatusRequest] getHealth: Could not find health status endpoint or file for serviceId: 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.nimblestorage.hi healthStatusString: null endpointUrl :(null)
2016-05-17T12:21:04.875-04:00 [pool-5-thread-29 ERROR com.vmware.sca.servicecontrol.handlers.ScriptControlHandler] Failed to locate script; name: dummy_path, dirs: [C:\Program Files\VMware\vCenter Server\sca\scripts, C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts], [java.lang.Exception: Script doesn't exist; path: C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts\dummy_path]
2016-05-17T12:21:04.875-04:00 [pool-5-thread-9 ERROR com.vmware.sca.servicecontrol.handlers.ScriptControlHandler] Failed to locate script; name: dummy_path, dirs: [C:\Program Files\VMware\vCenter Server\sca\scripts, C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts], [java.lang.Exception: Script doesn't exist; path: C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts\dummy_path]
2016-05-17T12:21:04.875-04:00 [pool-5-thread-29 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.netapp.nvpf
2016-05-17T12:21:04.875-04:00 [pool-5-thread-29 WARN com.vmware.sca.health.HealthStatusRequest] getHealth: Could not find health status endpoint or file for serviceId: 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.netapp.nvpf healthStatusString: null endpointUrl :(null)
2016-05-17T12:21:04.875-04:00 [pool-5-thread-9 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.vmware.vsan.health
2016-05-17T12:21:04.876-04:00 [pool-5-thread-4 ERROR com.vmware.sca.servicecontrol.handlers.ScriptControlHandler] Failed to locate script; name: dummy_path, dirs: [C:\Program Files\VMware\vCenter Server\sca\scripts, C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts], [java.lang.Exception: Script doesn't exist; path: C:\ProgramData\VMware\vCenterServer\cfg\sca\scripts\dummy_path]
2016-05-17T12:21:04.876-04:00 [pool-5-thread-4 WARN com.vmware.sca.servicecontrol.ServiceControlImplTemplate] executeControlRequest: Script missing for 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.netapp.nvpf.webclient
2016-05-17T12:21:04.876-04:00 [pool-5-thread-4 WARN com.vmware.sca.health.HealthStatusRequest] getHealth: Could not find health status endpoint or file for serviceId: 0a977fc5-813f-4602-9171-2ac72dcc8a16_com.netapp.nvpf.webclient healthStatusString: null endpointUrl :(null)