forward declare all svm types

[timosachsenberg]

Description

removes svm.h includes from header files

Checklist:

• Make sure that you are listed in the AUTHORS file
• Add relevant changes and new features to the CHANGELOG file
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes
• Updated or added python bindings for changed or new classes. (Tick if no updates were necessary.)

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Note:

• Once you opened a PR try to minimize the number of pushes to it as every push will trigger CI (automated builds and test) and is rather heavy on our infrastructure (e.g., if several pushes per day are performed).

Advanced commands (admins / reviewer only):

• /rebase will try to rebase the PR on the current develop branch.
• /reformat (experimental) applies the clang-format style changes as additional commit
• setting the label NoJenkins will skip tests for this PR on jenkins (saves resources e.g., on edits that do not affect tests)

[timosachsenberg]

rebuild jenkins

[timosachsenberg]

builds pass.
changing the CMakeList leads to errors in TOPP so probably some changes are needed.
I omitted the CMake change so we can merge this now.

diff --git a/src/openms/CMakeLists.txt b/src/openms/CMakeLists.txt
index 6ffaf41881..0d2ed6d3ae 100644
--- a/src/openms/CMakeLists.txt
+++ b/src/openms/CMakeLists.txt
@@ -128,7 +128,6 @@ foreach (includedir
          ${SEQAN_INCLUDE_DIRS}
          ${SQLite_INCLUDE_DIR}
          ${HDF5_INCLUDE_DIRS}
-         ${LIBSVM_INCLUDE_DIRS}
          ${EIGEN3_INCLUDE_DIR}
          ${WM5_INCLUDE_DIRS}
          ${CRAWDAD_INCLUDE_DIRS}
@@ -154,6 +153,7 @@ openms_add_library(TARGET_NAME  OpenMS
                    PRIVATE_INCLUDES ${EOL_BSPLINE_INCLUDE_DIRECTORY}
                                     ${ISOSPEC_INCLUDE_DIRECTORY}
                                     ${JSON_INCLUDE_DIRECTORY}
+                                    ${LIBSVM_INCLUDE_DIRS} #from contrib
                    EXTERNAL_INCLUDES ${OPENMS_CONTRIB_INCLUDE_DIRS} #root folder
                                      ${EVERGREEN_INCLUDE_DIRECTORY}
                                      ${SEQAN_INCLUDE_DIRECTORY}