Default number of minutes that can elapse before sudo will ask
for a password again is 5. It is too short for our increasing set
of tests.
In this patch we force sudo to ask for a password and provide sudo
with valid password each time.

test: add vector-iter-iter custom test

 Disable some libcxx tests for old g++ compilers.

verify if iter-iter vector ctor will construct vector from
element's type copy ctor

add emplace_constructible_copy_insertable_move_insertable helper class

They cannot be compiled due to lack of full C++11 support.

This was not included in #150 by mistake.

tests: expose env variable for changing pmreorder stacktrace depth

and show pmreorder log on test failure (if the log exists).

vector: change capacity to fit size (in ctors)

Fix gcc trivially copyable

std::is_trivially_copyable is missing in gcc < 5

test: vector copy/move/init_list constructor tests

Vector iterators and access methods

vector: fix transaction error msg

Import llvm tests for string.

test: remove redundant includes and fix comment

this test checks if specyfic access methods can be called
out of transaction scope and if accessed elements are being
snapshotted

test: add vector iterators.pass test

test: add vector contiguous.pass test

test: add vector data_const.pass and data.pass

Imported from llvm-mirror/libcxx@5ae92f0

vector: add libcxx iterator.pass test

Imported from llvm-mirror/libcxx@5ae92f0

vector: add libcxx types.pass test

Imported from llvm-mirror/libcxx@5ae92f0

test: add libcxx data tests

Imported from llvm-mirror/libcxx@5ae92f0

Imported from llvm-mirror/libcxx@88f5d7a38

Merge back changes from stable-1.5

Always initialize pmem::obj::array using double braces.

test: copy libcxx vector tests

test: rm unused file

vector: add comparison operators

Fix typo

Copy remaining libcxx vector tests.
Those test should be ported to test persistent vetctor.
Imported from llvm-mirror/libcxx@5ae92f0

transaction: add snapshot method

test/common/cont_test_common.hpp is as old file, we used to use
in tests for STL containers with persistent allocator