fix: avoid crash when printing help in wiremock-standalone (wiremock#2351)

Author: tomasbjerre

build.gradle

@@ -311,6 +311,7 @@ shadowJar {
  relocate "org.hamcrest", "wiremock.org.hamcrest"
  relocate "org.slf4j", "wiremock.org.slf4j"
  relocate "joptsimple", "wiremock.joptsimple"
+ exclude 'joptsimple/HelpFormatterMessages.properties'
  relocate "org.yaml", "wiremock.org.yaml"
  relocate "com.ethlo", "wiremock.com.ethlo"
  relocate "com.networknt", "wiremock.com.networknt"

src/main/resources/wiremock/joptsimple/HelpFormatterMessages.properties

@@ -0,0 +1,16 @@
+#
+# This is copied from joptsimple.
+# Properties prefixed with "wiremock" to match after relocation into standalone jar
+# Without this, the "--help" command will throw MissingResourceException
+#
+wiremock.joptsimple.BuiltinHelpFormatter.no.options.specified = No options specified
+wiremock.joptsimple.BuiltinHelpFormatter.non.option.arguments.header = Non-option arguments:
+wiremock.joptsimple.BuiltinHelpFormatter.option.header.with.required.indicator = Option (* = required)
+wiremock.joptsimple.BuiltinHelpFormatter.option.divider.with.required.indicator = ---------------------
+wiremock.joptsimple.BuiltinHelpFormatter.option.header = Option
+wiremock.joptsimple.BuiltinHelpFormatter.option.divider = ------
+wiremock.joptsimple.BuiltinHelpFormatter.description.header = Description
+wiremock.joptsimple.BuiltinHelpFormatter.description.divider = -----------
+wiremock.joptsimple.BuiltinHelpFormatter.default.value.header = default:
+wiremock.joptsimple.AlternativeLongOptionSpec.description = Alternative form of long options
+wiremock.joptsimple.AlternativeLongOptionSpec.arg.description = opt=value