Support for AzureAD authentication

[nikolaigauss]

It would be certainly quite nice for this plugin to support Azure AD authentication as a valid HTTP authentication method, currently this is preventing our users to use their own credentials to authenticate to TeamCity, leaving us with no option than falling back to local users in the platform which is not ideal.

[2021-02-25 15:19:51,833] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.137:37516), authenticated as '[email protected]' (Nicolas Piechocki) {id=14}: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace) [2021-02-25 15:19:57,733] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.137:37516), authenticated as '[email protected]' (Nicolas Piechocki) {id=14}: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace) [2021-02-25 15:20:14,264] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.137:37516), authenticated as '[email protected]' (Nicolas Piechocki) {id=14}: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace) [2021-02-25 15:20:20,387] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.137:37516), authenticated as '[email protected]' (Nicolas Piechocki) {id=14}: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace) [2021-02-25 15:20:41,718] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.48:52400), user-agent "Microsoft-Symbol-Server/10.1710.0.0", no auth: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace) [2021-02-25 15:20:41,720] WARN - jetbrains.buildServer.AUTH - Error occurred during HTTP authentication while processing request GET '/app/symbols/redactedClient.pdb/188C6D33880B478DA1B5BBF7A5A0EA661/redactedClient.pdb', from client 193.37.146.14 (10.129.4.48:52400), user-agent "Microsoft-Symbol-Server/10.1710.0.0", no auth: jetbrains.buildServer.serverSide.auth.AuthenticationFailedException: Incorrect username or password. (enable debug to see stacktrace)