Release 1.3.1

Zowe LTS 1.9 release

• Normalize the build-info and git properties files from the bundle cache (#503)
• Test speed improved (#506)
• Fix z/OSMF authorization header
• Enabler custom metadata support (#505)
• Added missed libraries for discoverable client's ui (#510)
• Remove usage of enablers from AC and GW to only use spring cloud (#496)
• Enable encoded slashes on Tomcat (#508)
• Enablers minor fixes (#512)
• Enabler sample apps improvements (#513)
• Externalize config for location of ehCache's storage files (#516)
• Changed scripts for publishing (#521)