Compiler error with intel

Hello,

I`ve posted the issue before in Boost.Log but was redirected to this project.

I have trouble to compile the following minimal example using actual 1.72 Boost Log with the intel compiler
### icpc version 19.0.5.281 (gcc version 4.8.5 compatibility)

```
#include "boost/log/trivial.hpp"

using namespace std;

int main(int argc, char** argv){
BOOST_LOG_TRIVIAL(error) << "Hello world";

return 0;
}
```
This results in the following compile error:

```
icpc -c -g -I/opt/tools/boost/boost-1.72.0/include -std=c++11 -MMD -MP -MF "build/Debug/Intel-Linux/main.o.d" -o build/Debug/Intel-Linux/main.o main.cpp
/opt/tools/boost/boost-1.72.0/include/boost/log/sources/severity_feature.hpp(252): error: more than one operator "|" matches these operands:
function template "boost::enable_if, boost::mpl::if_, boost::mpl::false_, boost::mpl::true_>, boost::mpl::false_>::type, boost::parameter::aux::default_>::type boost::parameter::keyword::operator|(Default &) const [with
Tag=boost::log::v2_mt_posix::keywords::tag::severity]"
function template "boost::enable_if, boost::mpl::false_, boost::mpl::eval_if, boost::mpl::true_, boost::mpl::if_, boost::mpl::true_, boost::mpl::false_>>>::type,
boost::parameter::aux::default_r_>::type boost::parameter::keyword::operator|(Default &&) const [with Tag=boost::log::v2_mt_posix::keywords::tag::severity]"
operand types are: const boost::parameter::keyword | boost::log::v2_mt_posix::trivial::severity_level
m_SeverityAttr.set_value(args[keywords::severity | m_DefaultSeverity]);
^
detected during:
instantiation of "boost::log::v2_mt_posix::record boost::log::v2_mt_posix::sources::basic_severity_logger::open_record_unlocked(const ArgsT &) [with BaseT=boost::log::v2_mt_posix::sources::basic_logger, boost::log::v2_mt_posix::sources::multi_thread_model>, LevelT=boost::log::v2_mt_posix::trivial::severity_level,
ArgsT=boost::parameter::aux::tagged_argument]" at line 459 of "/opt/tools/boost/boost-1.72.0/include/boost/log/sources/basic_logger.hpp"
instantiation of "boost::log::v2_mt_posix::record boost::log::v2_mt_posix::sources::basic_composite_logger::open_record(const ArgsT &) [with CharT=char, FinalT=boost::log::v2_mt_posix::sources::severity_logger_mt, ThreadingModelT=boost::log::v2_mt_posix::sources::multi_thread_model,
FeaturesT=boost::log::v2_mt_posix::sources::features>, ArgsT=boost::parameter::aux::tagged_argument]" at line 6 of "main.cpp"

compilation aborted for main.cpp (code 2)

```

With gcc everything is fine. It seems that changes came with 1.71 lead to this.

Thanks