Add tap tests on pgsodium objects schema (#67)

* Add tap tests on pgsodium objects schema

* Update pgtap extension to 1.2.0 in tests

* Force empty search_path when check pgsodium schema

This fixes errors related to the object schema resolution.

* Fix the search_path again...

* Force pgsodium version during pgtap test generation

* Order privileges by names

This makes any change easier to spot

* add tap tests on types

* Add various checks on functions

Adding checks for: language, return type, volatility, strictiness,
security definer and function kind.

* Check the event trigger properties

* Add table indexes and constraints checks

* Forgot to update the number of checks

Dockerfile

@@ -25,7 +25,7 @@ RUN git clone --branch REL_${version}_STABLE https://github.com/postgres/postgre
 
 RUN chown postgres:postgres /home/postgres
 
-RUN curl -s -L https://github.com/theory/pgtap/archive/v1.1.0.tar.gz | tar zxvf - && cd pgtap-1.1.0 && make && make install
+RUN curl -s -L https://github.com/theory/pgtap/archive/v1.2.0.tar.gz | tar zxvf - && cd pgtap-1.2.0 && make && make install
 RUN curl -s -L https://download.libsodium.org/libsodium/releases/libsodium-1.0.18.tar.gz | tar zxvf - && cd libsodium-1.0.18 && ./configure && make check && make -j 4 install
 RUN cpan App::cpanminus && cpan TAP::Parser::SourceHandler::pgTAP
 RUN mkdir "/home/postgres/pgsodium"