Pif, Template and storage repository data source panics when there are multiple matches

[ddelnano]

While trying to get the acceptance tests to run against the xo lab, I noticed that the pif data source panics during the acceptance tests.

panic: interface conversion: interface {} is []interface {}, not client.PIF

goroutine 33 [running]:
github.com/ddelnano/terraform-provider-xenorchestra/client.(*Client).GetPIFByDevice(0xc0004d4310, 0xc000036928, 0x4, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
        /home/ddelnano/go/src/github.com/ddelnano/terraform-provider-xenorchestra/client/pif.go:46 +0x200
github.com/ddelnano/terraform-provider-xenorchestra/xoa.dataSourcePIFRead(0xc00021e0e0, 0x1147ac0, 0xc000521800, 0xc00021e0e0, 0x0)
        /home/ddelnano/go/src/github.com/ddelnano/terraform-provider-xenorchestra/xoa/data_source_xenorchestra_pif.go:55 +0x1d5
github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Resource).ReadDataApply(0xc0001262d0, 0xc0003291c0, 0x1147ac0, 0xc000521800, 0xc00011ca48, 0x1, 0x0)
        /home/ddelnano/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.15.0/helper/schema/resource.go:403 +0x88
github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Provider).ReadDataApply(0xc000154000, 0xc00009fad0, 0xc0003291c0, 0xc0003291c0, 0x0, 0x0)
        /home/ddelnano/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.15.0/helper/schema/provider.go:451 +0x8f
github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin.(*GRPCProviderServer).ReadDataSource(0xc0000cc018, 0x1546060, 0xc0006b4210, 0xc0006b6000, 0xc0000cc018, 0xc0006b4210, 0xc000061b78)
        /home/ddelnano/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.15.0/internal/helper/plugin/grpc_provider.go:1036 +0x45d
github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5._Provider_ReadDataSource_Handler(0x11f55c0, 0xc0000cc018, 0x1546060, 0xc0006b4210, 0xc0005bb380, 0x0, 0x1546060, 0xc0006b4210, 0xc0000e5920, 0x55)
        /home/ddelnano/go/pkg/mod/github.com/hashicorp/terraform-plugin-sdk@v1.15.0/internal/tfplugin5/tfplugin5.pb.go:3341 +0x217
google.golang.org/grpc.(*Server).processUnaryRPC(0xc0000f6180, 0x1552cc0, 0xc000506c00, 0xc00008c900, 0xc0001429c0, 0x1d709d0, 0x0, 0x0, 0x0)
        /home/ddelnano/go/pkg/mod/google.golang.org/grpc@v1.27.1/server.go:1024 +0x501
google.golang.org/grpc.(*Server).handleStream(0xc0000f6180, 0x1552cc0, 0xc000506c00, 0xc00008c900, 0x0)
        /home/ddelnano/go/pkg/mod/google.golang.org/grpc@v1.27.1/server.go:1313 +0xd3d
google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc00019c2e0, 0xc0000f6180, 0x1552cc0, 0xc000506c00, 0xc00008c900)
        /home/ddelnano/go/pkg/mod/google.golang.org/grpc@v1.27.1/server.go:722 +0xa1
created by google.golang.org/grpc.(*Server).serveStreams.func1
        /home/ddelnano/go/pkg/mod/google.golang.org/grpc@v1.27.1/server.go:720 +0xa1
FAIL    github.com/ddelnano/terraform-provider-xenorchestra/xoa 1.282s
?       github.com/ddelnano/terraform-provider-xenorchestra/xoa/internal        [no test files]
FAIL

The data source should allow more fine grained filtering with network, pool or host information and also should never panic. I believe the storage repository data source also has this bug.

[ddelnano]

This is fixed in v0.6.0