Rename database client classes

Update our class names to reflect the new file structure introduced in
b700c1bef89a67a64f1040fb6bb03c0320eefe91.

Use the

    module DBShell
      module Client
      end
    end

syntax intead of `DBShell::Client` so that we don't have to define the
`Client` module in a separate file and require it. Otherwise we'd get an
error:

    lib/dbshell/client/sqlite3.rb:1:in `<top (required)>': uninitialized constant DBShell::Client (NameError)

3 files changed, 10 insertions, 10 deletions

diff --git a/spec/dbshell/client/database_spec.rb b/spec/dbshell/client/database_spec.rb
index e08d810..5fe5597 100644
--- a/spec/dbshell/client/database_spec.rb
+++ b/spec/dbshell/client/database_spec.rb
@@ -1,23 +1,23 @@
 require 'minitest/autorun'
 require 'dbshell/client/database'
 
-describe DBShell::DatabaseClient do
+describe DBShell::Client::Database do
   describe ".handler" do
     it "handles SQLite3" do
-      DBShell::DatabaseClient.handler({
+      DBShell::Client::Database.handler({
         'adapter' => 'sqlite3'
-      }).must_equal(DBShell::Sqlite3Client)
+      }).must_equal(DBShell::Client::Sqlite3)
     end
 
     it "handles Postgres" do
-      DBShell::DatabaseClient.handler({
+      DBShell::Client::Database.handler({
         'adapter' => 'postgresql'
-      }).must_equal(DBShell::PostgresClient)
+      }).must_equal(DBShell::Client::Postgres)
     end
 
     it "raises an error if no suitable adapter is found" do
       proc do
-        DBShell::DatabaseClient.handler({
+        DBShell::Client::Database.handler({
           'adapter' => 'sybil_system'
         })
       end.must_raise(DBShell::InvalidDatabaseAdapter)
diff --git a/spec/dbshell/client/postgres_spec.rb b/spec/dbshell/client/postgres_spec.rb
index c267ac0..c9cb2c7 100644
--- a/spec/dbshell/client/postgres_spec.rb
+++ b/spec/dbshell/client/postgres_spec.rb
@@ -1,10 +1,10 @@
 require 'minitest/autorun'
 require 'dbshell/client/postgres'
 
-describe DBShell::PostgresClient do
+describe DBShell::Client::Postgres do
   describe ".build_command" do
     it "builds basic arguments" do
-      DBShell::PostgresClient.build_command({
+      DBShell::Client::Postgres.build_command({
         'adapter' => 'postgresql',
         'host' => 'mailmarehost',
         'port' => 6027,
diff --git a/spec/dbshell/client/sqlite3_spec.rb b/spec/dbshell/client/sqlite3_spec.rb
index df42cbd..15d35a5 100644
--- a/spec/dbshell/client/sqlite3_spec.rb
+++ b/spec/dbshell/client/sqlite3_spec.rb
@@ -1,10 +1,10 @@
 require 'minitest/autorun'
 require 'dbshell/client/sqlite3'
 
-describe DBShell::Sqlite3Client do
+describe DBShell::Client::Sqlite3 do
   describe ".build_command" do
     it "builds basic arguments" do
-      DBShell::Sqlite3Client.build_command({
+      DBShell::Client::Sqlite3.build_command({
         'adapter' => 'sqlite3',
         'database' => 'db/development.sqlite3'
       }).must_equal([