Signed-off-by: NLeo Fang <leofang_94@163.com>

2. improve oa_upgradable print out message

1.save origin spec file in create_spec for need
2.bugfix for download_src()
3.bugfix for get_ver_tags()
4.add python2/3.yaml to upstream
5.dispaly all origin tags
6.ignore 'a[1-9...]' of alpha version
Signed-off-by: NLeo Fang <leofang_94@163.com>

- trivial changes caused by
	manual created YAML ==>
	script created YAML

	+---
	 version_control: github
	-src_repo:  yaml/pyyaml
	+src_repo: yaml/pyyaml
	-separator: .
	+separator: "."

- bug fix

	-tag_prefix: ^v
	+tag_prefix: "^"

- add git_url (future manual input just needs this)

	+git_url: https://github.com/yaml/pyyaml.git

- add git tags, prefix-and-ordered by date

	+git_tag:
	+  - 2020-03-18 5.3.1
	+  - 2020-01-06 5.3
	+  - 2018-08-16 4.1-retracted
	+  - 2019-12-21 5.3b1
Signed-off-by: NLiu Shaofei <liushaofei5@huawei.com>
Signed-off-by: NWu Fengguang <wufengguang@huawei.com>

Signed-off-by: NLiang Chenye <liangchenye@huawei.com>

Signed-off-by: NLiang Chenye <liangchenye@huawei.com>

Signed-off-by: NLiang Chenye <liangchenye@huawei.com>