config: rename testCase fields

So that their name better reflects their purpose

agent/config/segment_oss_test.go

@@ -18,10 +18,10 @@ func TestSegments(t *testing.T) {
 			args: []string{
 				`-data-dir=` + dataDir,
 			},
-			json: []string{`{ "server": true, "segment": "a" }`},
-			hcl:  []string{` server = true segment = "a" `},
-			err:  `Network segments are not supported in this version of Consul`,
-			warns: []string{
+			json:        []string{`{ "server": true, "segment": "a" }`},
+			hcl:         []string{` server = true segment = "a" `},
+			expectedErr: `Network segments are not supported in this version of Consul`,
+			expectedWarnings: []string{
 				enterpriseConfigKeyError{key: "segment"}.Error(),
 			},
 		},
@@ -30,10 +30,10 @@ func TestSegments(t *testing.T) {
 			args: []string{
 				`-data-dir=` + dataDir,
 			},
-			json: []string{`{ "segments":[{ "name":"x" }] }`},
-			hcl:  []string{`segments = [{ name = "x" }]`},
-			err:  `Port for segment "x" cannot be <= 0`,
-			warns: []string{
+			json:        []string{`{ "segments":[{ "name":"x" }] }`},
+			hcl:         []string{`segments = [{ name = "x" }]`},
+			expectedErr: `Port for segment "x" cannot be <= 0`,
+			expectedWarnings: []string{
 				enterpriseConfigKeyError{key: "segments"}.Error(),
 			},
 		},
@@ -42,10 +42,10 @@ func TestSegments(t *testing.T) {
 			args: []string{
 				`-data-dir=` + dataDir,
 			},
-			json: []string{`{ "segments":[{ "name":"x", "port": 123 }] }`},
-			hcl:  []string{`segments = [{ name = "x" port = 123 }]`},
-			err:  `Network segments are not supported in this version of Consul`,
-			warns: []string{
+			json:        []string{`{ "segments":[{ "name":"x", "port": 123 }] }`},
+			hcl:         []string{`segments = [{ name = "x" port = 123 }]`},
+			expectedErr: `Network segments are not supported in this version of Consul`,
+			expectedWarnings: []string{
 				enterpriseConfigKeyError{key: "segments"}.Error(),
 			},
 		},