Change XSLT version from 1.0 to 2.0

[cofinoa]

The XSLT document is using features from version 2.0 but the header mentions version 1.0.

For example for the some xsl:variable elements the as attribute is been used.

[version 1.0] https://www.w3.org/TR/xslt#variables
[version 2.0] https://www.w3.org/TR/xslt20/#variables

[cwardgar]

@lesserwhirls Should this change be made to threddsIso instead? Why do we have duplicate files in the first place? I'm not really sure how the iso stuff works.

[lesserwhirls]

Things are a bit interesting for threddsIso. The code lives in the threddsIso repository, and the canonical transforms and other resource files live there as well. From what I understand, we have to manually pull those over to the THREDDS code base to make sure they are accessible in the thredds.war file we create.

Currently there is a PR (threddsIso#31) to update UnidataDD2MI.xsl to use ACDD 1.3, although that PR still uses version 1.0 in the header. I'll mention this PR in that PR to see if @noaaroland can include the change.

[lesserwhirls]

Actually, the xls files in @noaaroland's PR do not use as, so maybe not an issue anymore? Once his PR is accepted, then we can copy over those new transforms to use in the TDS.