Replace ASSERT_EQ(bool,bool) by ASSERT_TRUE/ASSERT_FALSE(bool)

The former now raises gcc warnings:
  In file included from .../oce/test/gtest-1.7.0/include/gtest/gtest.h:1929:0,
                   from .../oce/test/STEPImport_test/STEPImport_test.cpp:4:
  .../oce/test/STEPImport_test/STEPImport_test.cpp: In member function ‘virtual void STEPImportTestSuite_testImportAP203_1_Test::TestBody()’:
  .../oce/test/gtest-1.7.0/include/gtest/internal/gtest-internal.h:133:55: warning: converting ‘false’ to pointer type for argument 1 of ‘char testing::internal::IsNullLiteralHelper(testing::internal::Secret*)’ [-Wconversion-null]
       (sizeof(::testing::internal::IsNullLiteralHelper(x)) == 1)
                                                         ^
  .../oce/test/gtest-1.7.0/include/gtest/gtest_pred_impl.h:77:52: note: in definition of macro ‘GTEST_ASSERT_’
     if (const ::testing::AssertionResult gtest_ar = (expression)) \
                                                      ^
  .../oce/test/gtest-1.7.0/include/gtest/gtest_pred_impl.h:166:3: note: in expansion of macro ‘GTEST_PRED_FORMAT2_’
     GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
     ^
  .../oce/test/gtest-1.7.0/include/gtest/gtest.h:1993:3: note: in expansion of macro ‘ASSERT_PRED_FORMAT2’
     ASSERT_PRED_FORMAT2(::testing::internal:: \
     ^
  .../oce/test/gtest-1.7.0/include/gtest/gtest.h:1994:32: note: in expansion of macro ‘GTEST_IS_NULL_LITERAL_’
                         EqHelper<GTEST_IS_NULL_LITERAL_(expected)>::Compare, \
                                  ^
  .../oce/test/gtest-1.7.0/include/gtest/gtest.h:2011:32: note: in expansion of macro ‘GTEST_ASSERT_EQ’
   # define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
                                  ^
  .../oce/test/STEPImport_test/STEPImport_test.cpp:22:13: note: in expansion of macro ‘ASSERT_EQ’
               ASSERT_EQ(Standard_False,shape.IsNull());
               ^
[clang-warning-fix][incrementing-bool]

Fix for following OSX 10.9 clang warning:
oce/src/BRepAlgo/BRepAlgo_Tool.cxx:84:9: warning: incrementing expression of type bool is deprecated [-Wdeprecated]
          NbSub++;
          ~~~~~^
1 warning generated.
[clang-warning-fix][unsequenced]

Fix for following OSX 10.9 clang warning fix:

/Users/thomas/Devel/oce/src/StdSelect/StdSelect_ViewerSelector3d.cxx:770:38: warning: unsequenced modification and access to 'II' [-Wunsequenced]
              gp_Pnt (C->GetPoint3d (++II).XYZ()),
                                     ^
/Users/thomas/Devel/oce/src/StdSelect/StdSelect_ViewerSelector3d.cxx:837:34: warning: unsequenced modification and access to 'II' [-Wunsequenced]
          gp_Pnt (C->GetPoint3d (++II).XYZ()),
                                 ^
2 warnings generated.
[clang-warning-fix][deprecated-writable-strings]

Fix for following OSX 10.9 clang warning fix:
oce/src/OpenGl/OpenGl_Display.cxx:38:36: warning: conversion from string literal to 'char *' is deprecated [-Wdeprecated-writable-strings]
    static char* TheDummyDisplay = "DISPLAY";
                                   ^
1 warning generated.
[clang-warning-fix][tautological-compare]

Fix following OSX 10.9 clang warning:
/Users/thomas/Devel/oce/src/Draw/Draw.cxx:410:35: warning: comparison of constant 4294967294 with expression of type 'Standard_Boolean' (aka 'bool') is always true [-Wtautological-constant-out-of-range-compare]
    } while (Draw_Interprete(cmd) != (unsigned int ) -2);
             ~~~~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~~~~
1 warning generated.