Add WA for libsodium18 package

  * See more information in [0]
  * For some reason, apt going to be crazy
    if found identical pkgs in different repos

apt-cache policy libsodium18
libsodium18:
  Installed: 1.0.8-5
  Candidate: 1.0.8-5
  Version table:
 *** 1.0.8-5 500
        500 http://mirror.mirantis.com/proposed/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status
     1.0.8-5 500
        500 http://repo.saltstack.com/apt/ubuntu/16.04/amd64/2017.7 xenial/main amd64 Packages
   So, lets pin it from the began

Closes-Bug: PROD-22326 (PROD:22326)
Related-Bug: PROD-21604 (PROD:21604)
[0] https://github.com/saltstack/salt/issues/49653

Change-Id: I13d4d45f0228328fac8cc2ed4f0cfae3ca63cefe
diff --git a/linux/system/repo/mcp/apt_mirantis/saltstack.yml b/linux/system/repo/mcp/apt_mirantis/saltstack.yml
index 22b3bb8..5ba85c0 100644
--- a/linux/system/repo/mcp/apt_mirantis/saltstack.yml
+++ b/linux/system/repo/mcp/apt_mirantis/saltstack.yml
@@ -13,7 +13,16 @@
           source: "deb [arch=amd64] ${_param:linux_system_repo_mcp_saltstack_url}/${_param:linux_system_codename}/ ${_param:linux_system_codename} main"
           architectures: amd64
           clean_file: true
-          pin:
-          - pin: 'release o=SaltStack'
-            priority: 1100
-            package: '*'
+          pinning:
+            10:
+              enabled: true
+              pin: 'release o=SaltStack'
+              # WA for https://github.com/saltstack/salt/issues/49653
+              # Should be removed with new version\fix in upstream.
+              priority: 50
+              package: 'libsodium18'
+            20:
+              enabled: true
+              pin: 'release o=SaltStack'
+              priority: 1100
+              package: '*'