[equo] force digest = "0" when regenerating packages

During installed packages repository generation, try to use older
digest value (from previous repo db) or force it to "0".
This way, packages with invalid digest will not be considered
during dependency calculation if they're already up-to-date.

client/text_rescue.py

@@ -614,14 +614,18 @@ def _database_generate(entropy_client):
     # clean caches
     entropy_client.clear_cache()
 
+    inst_repo = entropy_client.installed_repository()
+
     # try to collect current installed revisions if possible
+    # and do the same for digest
     revisions_match = {}
+    digest_match = {}
     try:
-        myids = entropy_client.installed_repository().listAllPackageIds()
+        myids = inst_repo.listAllPackageIds()
         for myid in myids:
-            myatom = entropy_client.installed_repository().retrieveAtom(myid)
-            myrevision = entropy_client.installed_repository().retrieveRevision(myid)
-            revisions_match[myatom] = myrevision
+            myatom = inst_repo.retrieveAtom(myid)
+            revisions_match[myatom] = inst_repo.retrieveRevision(myid)
+            digest_match[myatom] = inst_repo.retrieveDigest(myid)
     except:
         pass
 
@@ -699,6 +703,12 @@ def _database_generate(entropy_client):
             saved_rev = saved_rev
             mydata['revision'] = saved_rev
 
+        # set digest to "0" to disable entropy dependencies
+        # calculation check that forces the pkg to
+        # be pulled in if digest differs from the one on the repo
+        saved_digest = digest_match.get(myatom, "0")
+        mydata['digest'] = saved_digest
+
         idpk = entropy_client.installed_repository().addPackage(mydata,
             revision = mydata['revision'], do_commit = False)
         entropy_client.installed_repository().storeInstalledPackage(idpk,