Drop Helm v2 support (#613)

Resolves #589

Signed-off-by: xiaomudk <xiaomudk@gmail.com>

pkg/app/testdata/app_diff_test_2/helm2_upgrade_when_tns1_foo_needs_tns2_bar

@@ -1,54 +0,0 @@
-processing file "helmfile.yaml" in directory "."
-changing working directory to "/path/to"
-first-pass rendering starting for "helmfile.yaml.part.0": inherited=&{default map[] map[]}, overrode=<nil>
-first-pass uses: &{default map[] map[]}
-first-pass rendering output of "helmfile.yaml.part.0":
- 0: 
- 1: releases:
- 2: - name: foo
- 3:   chart: mychart1
- 4:   namespace: ns1
- 5:   tillerNamespace: tns1
- 6:   needs:
- 7:   - tns2/bar
- 8: - name: bar
- 9:   chart: mychart2
-10:   namespace: ns2
-11:   tillerNamespace: tns2
-12: 
-
-first-pass produced: &{default map[] map[]}
-first-pass rendering result of "helmfile.yaml.part.0": {default map[] map[]}
-vals:
-map[]
-defaultVals:[]
-second-pass rendering result of "helmfile.yaml.part.0":
- 0: 
- 1: releases:
- 2: - name: foo
- 3:   chart: mychart1
- 4:   namespace: ns1
- 5:   tillerNamespace: tns1
- 6:   needs:
- 7:   - tns2/bar
- 8: - name: bar
- 9:   chart: mychart2
-10:   namespace: ns2
-11:   tillerNamespace: tns2
-12: 
-
-merged environment: &{default map[] map[]}
-2 release(s) found in helmfile.yaml
-
-processing 2 groups of releases in this order:
-GROUP RELEASES
-1     tns2/bar
-2     tns1/foo
-
-processing releases in group 1/2: tns2/bar
-processing releases in group 2/2: tns1/foo
-Affected releases are:
-  bar (mychart2) UPDATED
-  foo (mychart1) UPDATED
-
-changing working directory back to "/path/to"

pkg/app/testdata/app_diff_test_2/helm2_upgrade_when_tns2_bar_needs_tns1_foo

@@ -1,54 +0,0 @@
-processing file "helmfile.yaml" in directory "."
-changing working directory to "/path/to"
-first-pass rendering starting for "helmfile.yaml.part.0": inherited=&{default map[] map[]}, overrode=<nil>
-first-pass uses: &{default map[] map[]}
-first-pass rendering output of "helmfile.yaml.part.0":
- 0: 
- 1: releases:
- 2: - name: bar
- 3:   chart: mychart2
- 4:   namespace: ns2
- 5:   tillerNamespace: tns2
- 6:   needs:
- 7:   - tns1/foo
- 8: - name: foo
- 9:   chart: mychart1
-10:   namespace: ns1
-11:   tillerNamespace: tns1
-12: 
-
-first-pass produced: &{default map[] map[]}
-first-pass rendering result of "helmfile.yaml.part.0": {default map[] map[]}
-vals:
-map[]
-defaultVals:[]
-second-pass rendering result of "helmfile.yaml.part.0":
- 0: 
- 1: releases:
- 2: - name: bar
- 3:   chart: mychart2
- 4:   namespace: ns2
- 5:   tillerNamespace: tns2
- 6:   needs:
- 7:   - tns1/foo
- 8: - name: foo
- 9:   chart: mychart1
-10:   namespace: ns1
-11:   tillerNamespace: tns1
-12: 
-
-merged environment: &{default map[] map[]}
-2 release(s) found in helmfile.yaml
-
-processing 2 groups of releases in this order:
-GROUP RELEASES
-1     tns1/foo
-2     tns2/bar
-
-processing releases in group 1/2: tns1/foo
-processing releases in group 2/2: tns2/bar
-Affected releases are:
-  bar (mychart2) UPDATED
-  foo (mychart1) UPDATED
-
-changing working directory back to "/path/to"