Fix image datasource test to avoid checking for specific launch options

Depending on the tenancy/region; the order of images returned by this may
be inconsistent. If checking against the first result, then the launch options
may vary across tenancy/regions.

Avoid checking for specific launch options values and only check for values
that are guaranteed by the datasource query.

Author: alexng-canuck

provider/core_images_data_source_test.go

@@ -62,12 +62,12 @@ func (s *DatasourceCoreImageTestSuite) TestAccImage_basic() {
 					resource.TestCheckResourceAttr(s.ResourceName, "images.0.create_image_allowed", "true"),
 					TestCheckResourceAttributesEqual(s.ResourceName, "images.0.display_name", "data.oci_core_images.allOracleImages", "images.0.display_name"),
 					resource.TestCheckResourceAttr(s.ResourceName, "images.0.state", string(core.ImageLifecycleStateAvailable)),
-					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_mode", "NATIVE"),
+					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.launch_mode"),
 					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_options.#", "1"),
-					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_options.0.boot_volume_type", "ISCSI"),
-					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_options.0.firmware", "UEFI_64"),
-					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_options.0.network_type", "VFIO"),
-					resource.TestCheckResourceAttr(s.ResourceName, "images.0.launch_options.0.remote_data_volume_type", "PARAVIRTUALIZED"),
+					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.launch_options.0.boot_volume_type"),
+					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.launch_options.0.firmware"),
+					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.launch_options.0.network_type"),
+					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.launch_options.0.remote_data_volume_type"),
 					resource.TestCheckResourceAttr(s.ResourceName, "images.0.operating_system", s.OperatingSystem),
 					TestCheckResourceAttributesEqual(s.ResourceName, "images.0.operating_system_version", "data.oci_core_images.allOracleImages", "images.0.operating_system_version"),
 					resource.TestCheckResourceAttrSet(s.ResourceName, "images.0.time_created"),