Update docs for repository validation message; (DOECODE-675)

Author: sowerstl

src/main/java/gov/osti/services/Metadata.md

@@ -383,7 +383,7 @@ A full JSON example is [provided below](#json_example).
 | --- | --- |
 | code_id | The unique value given to a particular DOE CODE Project record once stored.  Should be *null* or not provided for new entries, and will be returned once a record is saved or submitted successfully. |
 | accessibility | This refers to how the source of the project type is accessed; must be one of "OS" (open source), "ON" (open source, not public), "CS" (closed source, site hosted), or "CO" (closed source, OSTI hosted) |
-| repository_link | If the software project is available via public hosting service, such as github.com, bitbucket.org, etc. the public repository URL should be provided here. |
+| repository_link | If the software project is available via public hosting service, such as github.com, bitbucket.org, etc. the public repository URL should be provided here.  DOE CODE does not currently support the submission of individual branch URL paths, so this must be a primary or base URL for the repository. |
 | landing_page | If the project is not available via open source hosting site, provide a URL describing the project and contact information for obtaining binary or source |
 | developers | An array of Objects, providing information about a project's developers or creators.  Array order determines display order.  Fields are [specified below](#persons_fields). |
 | contributors | An array of information about project contributors. Fields are [specified below](#persons_fields). Contributors must specify a [type of contribution](#contributor_types) made to the project. |

src/main/java/gov/osti/services/Validation.md

@@ -81,7 +81,7 @@ connect to the URL.
 
 `GET /doecodeapi/services/validation/repositorylink?value=*value-to-check*`
 
-Check to see if the indicated value is a valid, accessible git repository.
+Check to see if the indicated value is a valid, accessible git repository.  DOE CODE does not currently support the submission of individual branch URL paths, so this must be a primary or base URL for the repository. 
 
 ### doi