[Ubuntu] Fix Erlang version in software report

SoftwareReport collects wrong version for Erlang, it reports Eshell
version rather than Erlang itself.
reference: https://stackoverflow.com/questions/9560815/how-to-get-erlangs-release-version-number-from-a-shell
2nd answer

`erl` doesn't have `-v` flag, only `-version`
`erlc` `-v` flag is for verbose output
`rebar3` reports it's version with flag `-v`
Change `erl -v` to `erl -version` as it gets stuck in certain scenarios
like using Docker as packer builder.
reference: http://erlang.org/doc/man/erl.html

images/linux/scripts/tests/Tools.Tests.ps1

@@ -110,15 +110,15 @@ Describe "Cmake" {
 }
 
 Describe "erlang" {
-    $testCases = @("erl", "erlc", "rebar3") | ForEach-Object { @{ErlangCommand = $_} }
+    $testCases = @("erl -version", "erlc -v", "rebar3 -v") | ForEach-Object { @{ErlangCommand = $_} }
 
     It "erlang <ErlangCommand>" -TestCases $testCases {
         param (
             [string] $ErlangCommand
         )
 
-        "$ErlangCommand -v" | Should -ReturnZeroExitCode
-    }   
+        "$ErlangCommand" | Should -ReturnZeroExitCode
+    }
 }
 
 Describe "gcc" {