Powershell script elytron-tool.ps1 doesn't work with custom credential store implementation.

There is problem with getting value of environment variable ELYTRON_TOOL_ADDONS.

How to reproduce:

• run powershell and set work directory JBOSS_HOME/bin
• set env variable for custom credential store implementation jar like this:

  $env:ELYTRON_TOOL_ADDONS="C:\custom.jar"
  

• run this command

  PowerShell -ExecutionPolicy Bypass -File elytron-tool.ps1 credential-store --add secret_alias --password pass123 --create -x secret_password -l 001.jceks --type CustomTestCredentialStore --debug
  Exception encountered executing the command:
  java.security.NoSuchAlgorithmException
  at org.wildfly.security.credential.store.CredentialStore.getInstance(CredentialStore.java:80) 
  at
  org.wildfly.security.tool.CredentialStoreCommand.execute(CredentialStoreCommand.java:188
  at org.wildfly.security.tool.ElytronTool.main(ElytronTool.java:81)
  

Suggestion to improve:
For me works one of these changes in elytron-tool.ps1 script

1. if (Test-Path env:ELYTRON_TOOL_ADDONS) { $ELYTRON_TOOL_ADDONS=(Get-ChildItem Env:ELYTRON_TOOL_ADDONS).value }
2. $ELYTRON_TOOL_ADDONS=$env:ELYTRON_TOOL_ADDONS