Support Apps Export from v2

[medamineziraoui]

Partial feature from issue #350
Support Exporting for applications

[ZouhairBear]

How to test :

Version to test : 2.1.19

The Export phase:

Create a build file:
Example of build.projectsExport.gradle:

plugins {
  id "io.saagie.gradle-saagie-dataops-plugin" version "2.1.19"
}
saagie {
    server {
        url = "REPLACE_SAAGIEURL"
        login = "REPLACE_SAAGIELOGIN"
	password = "REPLACE_SAAGIEPASSWORD"
        environment = "REPLACE_SAAGIE"
	jwt = true
    }
    project {
        id = "REPLACE_SAAGIE_PROJECT_ID"
    }
    apps {
          ids =  [ "802040db-c2fe-4569-959c-75a6411cda6d" ] // <=== You need to make sure that this app id exist in saagie platform
        }
    exportArtifacts {
          export_file = "./pipeline.zip" // <=== url  should exist  
          overwrite=true  // <=== temporary_directory ./tmp'  should exist        
    }
}

Export app using this commande :
The command line : gradle -b build.projectsExport.gradle projectsExport

[ZouhairBear]

• I have tested export apps from V2 without versions : it works as expected

[ZouhairBear]

• I have tested export apps from V2 with versions : it works as expected