Update HAL Browser Dependencies with latest JQuery, Toastr

[tdonohue]

References

• Upgrades JQuery to avoid known vulnerability (https://nvd.nist.gov/vuln/detail/CVE-2019-11358) in our local copy of the HAL Browser, reported in Hal browser uses jQuery version that contains a CVE mikekelly/hal-browser#99
• This PR is loosely based on Updating Jquery to latest version.  mikekelly/hal-browser#100 (but updated to use https://www.webjars.org/)

Description

Updates our locally customized HAL Browser to latest version of JQuery and Toastr

Instructions for Reviewers

Test the HAL Browser and especially the login screen. As long as behavior is unchanged, then this upgrade succeeds.

List of changes in this PR:

• Upgrades JQuery to v3.5.1
• Upgrades Toastr (used to create the success/failure notification on login page) to v2.1.4
• Updates our Server webapp to pull in both of these dependencies via WebJars.org
• Also corrects the License headers in the third-party files customized from the HAL Browser

[KevinVdV]

Made a review, didn't see any issues in the code. Built the code locally & could login & access protected endpoint as well.

[jtimal]

Okay, update to the jQuery v3.5.1 version, download the dependencies well and navigate well in some sections

[tdonohue]

Merging as this is at +2