Fix examples and tests for wdl 1.2.

[vsmalladi]

Fix some tests in 1.2 that can be parsed by wdl_test

Close #707
Close #708
Close #701

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[vsmalladi]

Closes #702

[claymcleod]

Did you have a look at #670? Regardless, it would be better to merge this into wdl-1.2.1 so that they can be included in that release.

[claymcleod]

But everything looks good once you check off the checklist and change the base branch 👍🏼.

[vsmalladi]

Did you have a look at #670? Regardless, it would be better to merge this into wdl-1.2.1 so that they can be included in that release.

Ya i did. This PR solves more syntax issues. I think that one is on accuracy of the tests.