fixing pitest failure by excluding purely generated code etc.

also removed unused methods and added a unit test to improve coverage
and setting thresholds now to 90% each

src/main/java/org/hostsharing/hsadminng/domain/Customer.java

@@ -195,16 +195,6 @@ public class Customer implements Serializable {
         return this;
     }
 
-    public Customer removeMembership(Membership membership) {
-        this.memberships.remove(membership);
-        membership.setCustomer(null);
-        return this;
-    }
-
-    public void setMemberships(Set<Membership> memberships) {
-        this.memberships = memberships;
-    }
-
     public Set<SepaMandate> getSepamandates() {
         return sepamandates;
     }
@@ -220,15 +210,6 @@ public class Customer implements Serializable {
         return this;
     }
 
-    public Customer removeSepamandate(SepaMandate sepaMandate) {
-        this.sepamandates.remove(sepaMandate);
-        sepaMandate.setCustomer(null);
-        return this;
-    }
-
-    public void setSepamandates(Set<SepaMandate> sepaMandates) {
-        this.sepamandates = sepaMandates;
-    }
     // jhipster-needle-entity-add-getters-setters - JHipster will add getters and setters here, do not remove
 
     @Override

src/main/java/org/hostsharing/hsadminng/domain/Membership.java

@@ -129,16 +129,6 @@ public class Membership implements Serializable {
         return this;
     }
 
-    public Membership removeShare(Share share) {
-        this.shares.remove(share);
-        share.setMembership(null);
-        return this;
-    }
-
-    public void setShares(Set<Share> shares) {
-        this.shares = shares;
-    }
-
     public Set<Asset> getAssets() {
         return assets;
     }
@@ -154,16 +144,6 @@ public class Membership implements Serializable {
         return this;
     }
 
-    public Membership removeAsset(Asset asset) {
-        this.assets.remove(asset);
-        asset.setMembership(null);
-        return this;
-    }
-
-    public void setAssets(Set<Asset> assets) {
-        this.assets = assets;
-    }
-
     public Customer getCustomer() {
         return customer;
     }