Move InvalidUserNameException to com.google.gerrit.server.account

Because that's the only package where it's used.

Change-Id: I2df2ac9f519131016cde03e277d3832524a02625

gerrit-server/src/main/java/com/google/gerrit/server/account/AccountManager.java

@@ -20,7 +20,6 @@ import com.google.gerrit.common.TimeUtil;
 import com.google.gerrit.common.data.AccessSection;
 import com.google.gerrit.common.data.GlobalCapability;
 import com.google.gerrit.common.data.Permission;
-import com.google.gerrit.common.errors.InvalidUserNameException;
 import com.google.gerrit.common.errors.NameAlreadyUsedException;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.AccountExternalId;

gerrit-server/src/main/java/com/google/gerrit/server/account/ChangeUserName.java

@@ -17,7 +17,6 @@ package com.google.gerrit.server.account;
 import static com.google.gerrit.reviewdb.client.AccountExternalId.SCHEME_USERNAME;
 
 import com.google.gerrit.common.Nullable;
-import com.google.gerrit.common.errors.InvalidUserNameException;
 import com.google.gerrit.common.errors.NameAlreadyUsedException;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.AccountExternalId;

gerrit-server/src/main/java/com/google/gerrit/server/account/InvalidUserNameException.java

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.common.errors;
+package com.google.gerrit.server.account;
 
 import com.google.gerrit.reviewdb.client.Account;
 

gerrit-server/src/main/java/com/google/gerrit/server/account/PutUsername.java

@@ -14,7 +14,6 @@
 
 package com.google.gerrit.server.account;
 
-import com.google.gerrit.common.errors.InvalidUserNameException;
 import com.google.gerrit.common.errors.NameAlreadyUsedException;
 import com.google.gerrit.extensions.restapi.AuthException;
 import com.google.gerrit.extensions.restapi.DefaultInput;